Benjamin Benjamin Marauder .22 Revisited

Today’s weather was witchy; storms and rain in the morning, but it cleared up nicely in the afternoon to the tune of 68F. I told my wife that with the weather nice for the next few days, I was rekindling my airgun love affair. I asked her to call one of the neighbors that may wonder WTH I was doing with a ‘rifle’. I figure prudence is the better part of valor; let’s avoid any misunderstandings.

As I mentioned in my recent intro post, I haven’t shot in a while. I decided to start with my Benjamin Marauder .22. There were a couple of reasons. First, I wanted to see if it still worked. Second, assuming it still worked and I could fill it with my Hill Pump, would it hold to pressure over the next few days as I dusted off my Beeman springers.

Nearest I can find via old musings on my blog, I last shot my Marauder in March 2018! And that too was after a multiple year hiatus of 7+ years. Bottom line, my Marauder hasn’t been used very much over the last 10 years; maybe 2-3 times. Maybe. That is sad and pathetic to be honest.

To get started I took the Hill Pump out of my closet. Other than dusting it off, I didn’t do any prep work. I am not 100% sure that this is my Hill Pump (since I bought it in 2009), but it looks similar enough.

One thing I noticed right away was the canister (holds dry-pac) was loose. I wasn’t sure if this was a problem or normal. I just made sure that the air hole on it lined up with the air hole on the pump. I bring this up in case someone has some pointers on Hill Pump maintenance. Please. I have never replaced the dry-pac and really have no idea if I should. After all, this pump was purchased in 2009.

One of the first things I noticed after I cleaned the Marauder was that the gauge was showing 500 PSI. The festivities of the pumping begin …

I am reminded again what a pain it is to pump. What is wrong with me? Out of shape? Does the pump not work right? Does pumping just suck? Was this the reason I dreaded purchasing a PCP all those years ago?

So I pump. And pump. I notice the Marauder is around 1000 PSI and the Hill Pump is 1,200 PSI. 1,900 vs 2,200. Finally 3,000 vs 3100-3200. Something to do with using a pump and the pressure going back into it? Thankfully I remember that I better bleed the air from the pump before removing it from the Marauder!

My Hill Pump works, the Marauder (with Hawke scope - not sure of the model but can figure that out if anyone is interested) is clean and at 3,000 PSI. I am ready to go shoot! But …

Where are my magazines? I have 4+ but have no idea where they are and start what amounts to an Easter Egg hunt. Without the magazines, the only thing I will accomplish is to make sure the Marauder is clean (and Hill Pump works) and watch to see if the pressure holds until I buy some new magazines or find mine. Good grief!

I eventually find one (let’s call it magazine #1), which is loaded with mystery pellets. I really don’t know what is in the magazine. Hopefully whatever the Marauder enjoys. After a good bit of searching and unexpected New Year’s cleaning, I find a container labeled “airguns” and a treasure trove of items including 4 magazines. Happy dance!

I load up magazine #2 with Crosman Premier Domed 14.3 gr pellets - I am pretty sure that this was the preferred pellet the last time I shot the Marauder. I load up magazine #3 with Kodiak Double Golds**. I picked these because the tin was open and some of the pellets had spilled and were tarnished. I figured I may as well use them while getting reacquainted with my Marauder.

Finally. Finally I can reward myself with some plinking. I set up my old range. This one is about 23-25 yards. Cans in various positions and a few other random targets. Try #1 was great - lots of action. I am happy with the results. Adrenaline is pumping - it has been forever since I have done any shooting of any sort! I think I may have shot pellets 6 and 7 together; I am not sure, but I think the Marauder is built to hold up to any idiot abuse I serve up.

I check out my accuracy and set up another round of targets. Magazine #2 was a pleasure to shoot. Accuracy was off the chart; let’s just say that I was happy with the results and felt like I couldn’t miss. This round was like a homecoming of sorts.

I decided to shoot the third and final magazine. After that, take a gauge reading, pump back up to 3,000 PSI, and call it a day. I couldn’t hit chit … I was wide left, right, aiming for a plastic bottle cap but hearing the plink of a beer can. WTH? I guess fatigue set in. The Marauder is on the heavy side and my arms were probably tired from all that earlier pumping.

On a lark, I decided to look at the pellets for magazine #3 - the Kodiak Double Golds**. At this point anyone following along may wonder why the ** for magazine #3. These pellets are not .22, which explains why I was so far off the mark, so to speak. I feel better but at the same time, awful - did I just mess up a perfectly nice Marauder by loading a magazine with the wrong caliber pellets?

As I wrapped up the session, the Marauder’s gauge was at ~2,500 PSI, after 30 shots. I really have no idea (and don’t remember past history, experiences) if that is a good or bad or average burn off. Much to my chagrin, I used the Hill Pump to restore the Marauder to 3,000 PSI. I want to leave it for a few days to see if it holds and go from there.

All in all, I am happy. When I first ordered my Marauder, there was ultimately a problem that Crosman fixed. When you think about the fact that this airgun has been rarely used over the last 10 years and it was flawless today (except for user error on magazine #3**), that is a testament to the manufacturing of this Gen 1 Marauder. Color me impressed.

Am I back? Depends on if I shoot tomorrow. With that said, it was such a great experience to be back in action, plinking again.

Up next, Beeman springer fun.

** Kodiak Double Golds .20 caliber (weight not listed)
 
Today’s weather was witchy; storms and rain in the morning, but it cleared up nicely in the afternoon to the tune of 68F. I told my wife that with the weather nice for the next few days, I was rekindling my airgun love affair. I asked her to call one of the neighbors that may wonder WTH I was doing with a ‘rifle’. I figure prudence is the better part of valor; let’s avoid any misunderstandings.

As I mentioned in my recent intro post, I haven’t shot in a while. I decided to start with my Benjamin Marauder .22. There were a couple of reasons. First, I wanted to see if it still worked. Second, assuming it still worked and I could fill it with my Hill Pump, would it hold to pressure over the next few days as I dusted off my Beeman springers.

Nearest I can find via old musings on my blog, I last shot my Marauder in March 2018! And that too was after a multiple year hiatus of 7+ years. Bottom line, my Marauder hasn’t been used very much over the last 10 years; maybe 2-3 times. Maybe. That is sad and pathetic to be honest.

To get started I took the Hill Pump out of my closet. Other than dusting it off, I didn’t do any prep work. I am not 100% sure that this is my Hill Pump (since I bought it in 2009), but it looks similar enough.

One thing I noticed right away was the canister (holds dry-pac) was loose. I wasn’t sure if this was a problem or normal. I just made sure that the air hole on it lined up with the air hole on the pump. I bring this up in case someone has some pointers on Hill Pump maintenance. Please. I have never replaced the dry-pac and really have no idea if I should. After all, this pump was purchased in 2009.

One of the first things I noticed after I cleaned the Marauder was that the gauge was showing 500 PSI. The festivities of the pumping begin …

I am reminded again what a pain it is to pump. What is wrong with me? Out of shape? Does the pump not work right? Does pumping just suck? Was this the reason I dreaded purchasing a PCP all those years ago?

So I pump. And pump. I notice the Marauder is around 1000 PSI and the Hill Pump is 1,200 PSI. 1,900 vs 2,200. Finally 3,000 vs 3100-3200. Something to do with using a pump and the pressure going back into it? Thankfully I remember that I better bleed the air from the pump before removing it from the Marauder!

My Hill Pump works, the Marauder (with Hawke scope - not sure of the model but can figure that out if anyone is interested) is clean and at 3,000 PSI. I am ready to go shoot! But …

Where are my magazines? I have 4+ but have no idea where they are and start what amounts to an Easter Egg hunt. Without the magazines, the only thing I will accomplish is to make sure the Marauder is clean (and Hill Pump works) and watch to see if the pressure holds until I buy some new magazines or find mine. Good grief!

I eventually find one (let’s call it magazine #1), which is loaded with mystery pellets. I really don’t know what is in the magazine. Hopefully whatever the Marauder enjoys. After a good bit of searching and unexpected New Year’s cleaning, I find a container labeled “airguns” and a treasure trove of items including 4 magazines. Happy dance!

I load up magazine #2 with Crosman Premier Domed 14.3 gr pellets - I am pretty sure that this was the preferred pellet the last time I shot the Marauder. I load up magazine #3 with Kodiak Double Golds**. I picked these because the tin was open and some of the pellets had spilled and were tarnished. I figured I may as well use them while getting reacquainted with my Marauder.

Finally. Finally I can reward myself with some plinking. I set up my old range. This one is about 23-25 yards. Cans in various positions and a few other random targets. Try #1 was great - lots of action. I am happy with the results. Adrenaline is pumping - it has been forever since I have done any shooting of any sort! I think I may have shot pellets 6 and 7 together; I am not sure, but I think the Marauder is built to hold up to any idiot abuse I serve up.

I check out my accuracy and set up another round of targets. Magazine #2 was a pleasure to shoot. Accuracy was off the chart; let’s just say that I was happy with the results and felt like I couldn’t miss. This round was like a homecoming of sorts.

I decided to shoot the third and final magazine. After that, take a gauge reading, pump back up to 3,000 PSI, and call it a day. I couldn’t hit chit … I was wide left, right, aiming for a plastic bottle cap but hearing the plink of a beer can. WTH? I guess fatigue set in. The Marauder is on the heavy side and my arms were probably tired from all that earlier pumping.

On a lark, I decided to look at the pellets for magazine #3 - the Kodiak Double Golds**. At this point anyone following along may wonder why the ** for magazine #3. These pellets are not .22, which explains why I was so far off the mark, so to speak. I feel better but at the same time, awful - did I just mess up a perfectly nice Marauder by loading a magazine with the wrong caliber pellets?

As I wrapped up the session, the Marauder’s gauge was at ~2,500 PSI, after 30 shots. I really have no idea (and don’t remember past history, experiences) if that is a good or bad or average burn off. Much to my chagrin, I used the Hill Pump to restore the Marauder to 3,000 PSI. I want to leave it for a few days to see if it holds and go from there.

All in all, I am happy. When I first ordered my Marauder, there was ultimately a problem that Crosman fixed. When you think about the fact that this airgun has been rarely used over the last 10 years and it was flawless today (except for user error on magazine #3**), that is a testament to the manufacturing of this Gen 1 Marauder. Color me impressed.

Am I back? Depends on if I shoot tomorrow. With that said, it was such a great experience to be back in action, plinking again.

Up next, Beeman springer fun.

** Kodiak Double Golds .20 caliber (weight not listed)
:) Oops! I'm stuck on .22 for that reason more so than any other!
 
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Thanks for sharing. The beauty is in the simplicity of Marauders. This post proves that. Sounds like yours is still shooting good after all these years.
I can’t see you hurting it at all with the wrong pellets. Worse case maybe clip a baffle or blow out the barrel breech oring. I’m sure it’s fine though. Wouldn’t hurt to change that breech oring anyways. It’s easy to do and you can usually get the orings at a hardware store. Pretty sure it’s #009 oring. Can check the parts diagram to verify.

Get out and shoot some more today 🤘💪

Rob
 
Thanks for sharing. The beauty is in the simplicity of Marauders. This post proves that. Sounds like yours is still shooting good after all these years.
I can’t see you hurting it at all with the wrong pellets. Worse case maybe clip a baffle or blow out the barrel breech oring. I’m sure it’s fine though. Wouldn’t hurt to change that breech oring anyways. It’s easy to do and you can usually get the orings at a hardware store. Pretty sure it’s #009 oring. Can check the parts diagram to verify.

Get out and shoot some more today 🤘💪

Rob

I long ago forgot who made this chart but it has most of the O-ring sizes for the ultra simple, never out of date, always reliable M-Rod:

 
Thanks for sharing. The beauty is in the simplicity of Marauders. This post proves that. Sounds like yours is still shooting good after all these years.
I can’t see you hurting it at all with the wrong pellets. Worse case maybe clip a baffle or blow out the barrel breech oring. I’m sure it’s fine though. Wouldn’t hurt to change that breech oring anyways. It’s easy to do and you can usually get the orings at a hardware store. Pretty sure it’s #009 oring. Can check the parts diagram to verify.

Get out and shoot some more today 🤘💪

Rob
Thanks for this response. I am going to hold off on shooting the Marauder again for 24 hours (maybe … the weather is so nice that I may not be able to resist temptation). I want to make sure pressure is holding correctly. It looks like it is after 18 hours; hopefully.

To be honest, I haven’t done much work on airguns; really just some basics. My original July 2009 Marauder did have some issues, that Crosman ultimately took care of with a new Marauder via a warranty repair (this is the same replacement gun, September 2009 SN / model). Before sending it in, I did attempt some basic maintenance. I could probably figure it out, but not going to do anything major if my groupings continue to hold.

BTW, any idea on the Hill Pump canister connector? re: “One thing I noticed right away was the canister (holds dry-pac) was loose. I wasn’t sure if this was a problem or normal. I just made sure that the air hole on it lined up with the air hole on the pump.” I am wondering if I am making pumping much harder than it should be …?
 
I long ago forgot who made this chart but it has most of the O-ring sizes for the ultra simple, never out of date, always reliable M-Rod:
Thanks for the post and info. Is blowing out an O-ring, or maybe just wearing out with use or time, common? I could probably search for some basic PCP / Marauder maintenance posts, PDFs, links, etc, but thought I would ask since you provided the useful chart. 😇
 
Thanks for this response. I am going to hold off on shooting the Marauder again for 24 hours (maybe … the weather is so nice that I may not be able to resist temptation). I want to make sure pressure is holding correctly. It looks like it is after 18 hours; hopefully.

To be honest, I haven’t done much work on airguns; really just some basics. My original July 2009 Marauder did have some issues, that Crosman ultimately took care of with a new Marauder via a warranty repair (this is the same replacement gun, September 2009 SN / model). Before sending it in, I did attempt some basic maintenance. I could probably figure it out, but not going to do anything major if my groupings continue to hold.

BTW, any idea on the Hill Pump canister connector? re: “One thing I noticed right away was the canister (holds dry-pac) was loose. I wasn’t sure if this was a problem or normal. I just made sure that the air hole on it lined up with the air hole on the pump.” I am wondering if I am making pumping much harder than it should be …?
The clear canister that holds the dry-pac screws onto the black base and may just be lose. Is that what your referring to? The black base has 2 o-rings and may be dried out. And for media, I would toss that out. I can't imagine it's still good. Get yourself a container of molecular sieve and repack it and save the rest in Manson jars vacuum sealed.
 
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After a very long career working with O rings, yes they wear out and require routine replacement. They are not as simple as they appear, every aspect of an O-ring seal is variable.
When well engineered O-ring seals can function for decades. Material selection and tolerances, when we get those right a long service life is assured.
High pressure applications means we are working at the sharp end of the stick, caution always.
Tho they may cost more, getting the O-rings from the people that made your gun is wise. I'm always willing to pay more to get exactly the right item. Or their authorized dealer of course, in very high pressure applications substitution of O-rings can be dangerous. Generic or hardware store O-rings are soft, higher durometer are typically employed for high pressure applications.
Stay safe always when working with pressures that have 4 digits.
 
Thanks for the post and info. Is blowing out an O-ring, or maybe just wearing out with use or time, common? I could probably search for some basic PCP / Marauder maintenance posts, PDFs, links, etc, but thought I would ask since you provided the useful chart. 😇

Yes, O-rings will eventually need replacing. Some Chinese rifles come needing new O-rings ;) NIB, it is a feature to justify the low prices along with black painted pot metal. Even those $2,500 FX rifles come with pre-made leaks and barrels that do not hold POI just so as not to spoil the owners. That your M-Rod after so many years does not leak is great but in the fullness of time, even the M-Rod will need new seals. It is the easiest or at least one of the easiest rifles to work on, very simple, available parts if and when needed and a deep pool of knowledge available.

The O-rings from Crosman and et al are nothing special. Many sources from hardware stores to the online O-ring Store carry O-rings in many materials and durometers, 70 and 90 (the higher the number the harder is the composition of the O-ring). Most common are Buna-N (Nitrile) is the typical material. Do not let people scare you into not learning how to tune and service your easy peezy M-Rod.

Edit to add, your owners manual gives you most of the O-ring sizes and the Crosman part numbers (for the .25 below):



 
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Your .22 Marauder only dropped 500 psi after 30 shots ? I'd say that's a keeper! Crosman advertises ~32 shots/fill.
Any chance of getting chrony data next time out?
Yes. I covered this above, but it may be worth mentioning again. This is a September 2009 batch / SN; it has been shot a fair amount, but it has been sitting dormant for a good 5 (maybe 7) years. I filled it to 3000 PSI.

I typically load up 4 magazines and go to work. I will pay close attention my next session later this week, but I have always gotten way more shots than what you mention, before I needed to refill.

I have an old chrony … but TBH, I am not sure if it still works (It has been in a closet for 10+ years).
 
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The clear canister that holds the dry-pac screws onto the black base and may just be lose. Is that what you’re referring to? The black base has 2 o-rings and may be dried out. And for media, I would toss that out. I can't imagine it's still good. Get yourself a container of molecular sieve and repack it and save the rest in Manson jars vacuum sealed.
Thanks for the help/info - it is the part shown in #13 in the image. The interesting part is to “rotate to required position” - I thought maybe the canister holder assembly should always be static, but I guess not. And now I have no idea if the o-rings should be replaced, since the pump seemed to work fine.

Because I have been out of action so long, I have no idea where I should turn to get some new, replacement dry-pac, but will figure that out when I need some pellets or something …

IMG_0195.jpeg
 
Thanks for the help/info - it is the part shown in #13 in the image. The interesting part is to “rotate to required position” - I thought maybe the canister holder assembly should always be static, but I guess not. And now I have no idea if the o-rings should be replaced, since the pump seemed to work fine.

Because I have been out of action so long, I have no idea where I should turn to get some new, replacement dry-pac, but will figure that out when I need some pellets or something …

View attachment 524727
That part doesn't matter where it's indexed, I have mine in the 6 o'clock position to keep it away from my toes. It should rotate with resistance. Parts can be had from Hill, PA etc. If needed. The dry-pac media should be replaced every 3 months, so just get yourself jug of molecular sieve and have a lifetime supply.

1000007409.jpg
 
That part doesn't matter where it's indexed
OK, thanks for the info. I find this interesting because I thought the canister had a hole that needed to line up to the pump. But I haven’t experimented.

You are also the 2nd or 3rd person that mentioned replacing the dry-pac. I think I will do that in the near future, maybe as part of a pellet order.
 
Let me follow up the original post with some follow up shooting action today. I’ll be brief (minor miracle, I know).

First, the Marauder gauge shows that pressure has held at a tick over 3000 PSI for 36+ hours. I think it is fair to say that there are no leaks. To me, this is a testament to the quality of the Marauder after being dormant for 5-7 years. Maybe Crosman will read this and give me a call. LOL

Today was great - 70F, clear and perfect plinking weather. I setup 4 magazines for a quick afternoon session:

#1 - Beeman FTS Double Gold Extended Range (I think 14.72 gr)
#2 - Crosman Premier Domed 14.5gr
#3 - Daisy Precision Max; no idea where I got these … flat head, no idea of pellet weight … and they are dirty as all get out
#4 - Napier Power Hunter (I think 15.42 gr)

To be transparent, I was plinking and not looking for perfect groups. I was shooting from a “butt on the driveway” position and about 23-25 years from my targets. The Marauder is just so damn impressive! I can safely say that each magazine shot well - no pellet drift and placement was about what I expected. Maybe … maybe … maybe the Crosman Premiers, Double Golds and Napier Power Hunters in that order.

By the time I was done, the PSI went from 3000 to 2400’ish, which to me isn’t that bad for 4 magazines. I’ll probably pump back up to 3000 and put the Marauder away for a couple of days, to continue to test for leaks.
 
OK, thanks for the info. I find this interesting because I thought the canister had a hole that needed to line up to the pump. But I haven’t experimented.

You are also the 2nd or 3rd person that mentioned replacing the dry-pac. I think I will do that in the near future, maybe as part of a pellet order.
It's doesn't need to lined up, the body on the pump is machined with a relief like a banjo bolt on a motorcycle brake line. Just position it so it's not in your way.
 
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It's doesn't need to lined up, the body on the pump is machined with a relief like a banjo bolt on a motorcycle brake line. Just position it so it's not in your way.
Thanks. Learn something new daily. LOL

I don’t see it on the Hill reference PDF. Replacing the dry-pac seems straight forward. If I need to o-rings (reference on my screen shot above, as #14), where do I get them? I looked on the hillpump site, but didn’t find anything that looked like my hand pump.
 
Thanks. Learn something new daily. LOL

I don’t see it on the Hill reference PDF. Replacing the dry-pac seems straight forward. If I need to o-rings (reference on my screen shot above, as #14), where do I get them? I looked on the hillpump site, but didn’t find anything that looked like my hand pump.
I haven't crossed that bridge yet. The filter is a add on so you may need to drop Hill an email. Also, if it fits snug and has resistance when rotating, you don't need to bother.