Tuning Maverick Sniper barrel issue

[Larry1956]

My .22 Maverick compact was tuned to shoot JSB18.13gr pellets at about 880fps on PW7. Now when I put the Sniper barrel on in the Slug side, my power goes way down hitting the ground in front of even a 30 yard target. Im trying to shoot a 20gr javelin Slug. I noticed the porting on the Sniper barrel is way smaller than the compact barrel-attached photos. So what might be happening? My regs are 135/110.

Top barrel is the sniper. Tried turning PW Down thinking I had too much hammer with sniper barrel but had even less power. Hammer weight is 7gr oem as is the rest of the gun. Gun originally sold in compact version.

 

[DonaAna1]

Porting isn't finished on the sniper barrel. Ports should be the same on both barrels.



Great quality control there.

 

[Larry1956]

Thks for the quick reply. No wonder I've been having a helluva time trying to shoot out of this barrel. Will contact my dealer and FX for a warranty barrel replacement.

 

[TMH]

I'm not sure that the upper barrel in your photo isn't an older barrel. Before FX went to Pellet on one side and Slug on the other, they had Full Power and Low Power on either side. Looks like an older barrel where you could choose full or low power by turning it 180 degrees.

 

[Larry1956]

Had it on the "full power", didn't have any power at all. Shots all went in the dirt at 30 and 50yards. What I was expecting, on the Slug port over the Slug port on the compact barrel, was an increase in velocity and power on the Slug port at pw7 , instead power was in the dirt.

 

[Larry1956]

Contacted my dealer on this and I should know soon on how they want to proceed with fixing this issue. Will keep u posted.

 

[Jlowe]

If it's only shooting 880 fps with a JSB 18.13 on PW7, the gun is set low to begin with. Do you have a chronograph? My 22 Maverick Compact came stock shooting 923 fps on PW7 with 150/100 reg setting from the factory. It's easy to tune with a chronograph. 

 

[ChuckHunter]

You sure you have it on power 7?

Had a buddy that was scratching his head over the same thing...he had the 7 on the power wheel pointing up thinking it was full power!!! Lol 

Was actually on power 4 which was at the bottom..

Another thing check the breach oring!! Is it in there?

 

[FX-USA]

Hi Larry1946, 

Please feel free to give us a phone call or E-mail with our technician or customer service department to help find a solution that best works for you. 

Regards, 

FX Airguns USA

Contact 

Monday - Thursday 9 AM - 4 PM EST
Fridays 9 AM - 3 PM EST
Phone: +1 866 639 0772
[email protected]

 

[Larry1956]

Jasmlowe,

Will try those reg settings. Do you know how far out is your hsa? Know how to read the PW. Barrel/breach is air tight. Found that out the hard way when I got a Slug stuck in her. When I opened breach air hissed out. Also, no air is coming out anywhere around the action when it's fired. Now, about the Sniper barrel, it definitely is an issue with the transfer ports. As you can see by the photo. The barrel was bought in July, so it should have had the new porting not the high low porting. Suspect this was laying around at the dealer and might seen a chance to unload it. These are premium rifles and premium parts and they should be gone over with a fine tooth comb for quality by both the mfg and the dealer that sales it. Will follow up with FX tomorrow. Hopefully this will be resolved quickly and to my satisfaction.

 

[Larry1956]

Since the transfer port on my 700mm barrel is wrong, I wonder if my hammer weight is correct fo

r this gun originally sold as a .22 Maverick Compact. So can anyone out there confirm that my hammer is correct. As I understand it, there are three hammer weights, 7, 11, and 13 gram. My hammer weight is the lightest.

 

[Airgunmann]

Thought I just read the 22 and 25 had the 11 and slug power kit comes with the 13 177 has the 7 22anf 25 have 11 and 30 cal has 13 along with the power kit also has the 13 I think is what I just read on another post it's the hammer weight questions post and I think it was started by atom in the discussion part of forum 

 

[Larry1956]

So I not only get a barrel that has God knows what kind of ports in it, but a hammer weight for a .177 in my .22. Almost makes me want to sale my Mavericks and get an Edgun. FX, ARE YOU READING THIS, LET'S GET THIS RECTIFIED ASAP, PLEASE. I've emailed FX service very early this morning and still awaiting an answer and I've done same to my dealer that sold me the barrel kit. Now with this new revelation about the hammer weight I will need to contact my rifle dealer.

 

[18.13]

Your barrel ports are the same as my Crown mkii from earlier in the year. And my 30 cal Maverick has the 11g weight and shoots just fine 

The 30 cal Mavericks only have one port 

 

[Jlowe]

Since the transfer port on my 700mm barrel is wrong, I wonder if my hammer weight is correct fo

//www.w3.org/2000/svg%22%20viewBox=%220%200%20210%20140%22%3E%3C/svg%3Er this gun originally sold as a .22 Maverick Compact. So can anyone out there confirm that my hammer is correct. As I understand it, there are three hammer weights, 7, 11, and 13 gram. My hammer weight is the lightest.

Here is a pic of the stock hammer weights that came out of my 22 compact and 22 sniper Maverick. The same as yours. I replaced them with the 25 hammer weight. The one at the bottom is the one that comes with the slug kit. 

I maxed out the compact 22 at 41.5 foot pounds before upgrading to the 25cal hammer weight. I bought the Sniper 22 second and didn't even bother with the stock hammer weight. I can't find my pic of the 25cal hammer weight, but if I do, I'll post it here for you. 

 

[Keyman62421]

My 25 compact is ported like picture. Its manufacturing feature. I guess you could drill that port out to what you wanted? Dont know if I would?

It did cross my mind that it could be a sub 12lb port. Silly me? Cant see it on 25. Maybe 117.

 

[Larry1956]

Keyman,

Why should I drill it out when it is a mfg defect. So to be clear with what you said, your 25 is ported like that but u can't see it?????

 

[18.13]

Back earlier in the year when this barrel was standard people were big into modifying their own ports. I was told this was a pilot hole for do it your selfers 

 

[Larry1956]

After paying a premium price for a premium rifle I really don't want to start wrenching on it just so it'll shoot to mfg specifications.

 

[Larry1956]

Jasmlowe,

Your heavier hammer weight is the same as my .30 Maverick. I was just informed by FX just what u sent me and that is my hammer is the same as your stock hammer weight. FX recommend that I set my regs to 135/105 PW7 and hsa to 22mm that includes spring cup and the micro adjuster screw stick out. Will try this setting later today. Keep u posted.