Seen her where some have done flat top pistons, larger valve volume, longer barrels, bigger transfer ports steel breeches. One guy even made a front pump arm pivot pin support insert.
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N/A Any high end pumpers around?
- Thread starter muradtexas
- Start date
Tim McMurray from mac 1 airguns used to do a "steroid" mod on the Benjamins and Sheridans for more power potential. The added power came at the cost of more pumps necessary. He would beef up the pump linkage and adjust the pump cup so it got maximum compression from each pump stroke. Sadly Tim's website has shut down, at least for now. He was a knowledgeable guy for all the power mods to your pumpers and Co2 guns.
On the subject of the Titan Mohawk, I recall an article Tom Gaylord wrote about it-I seem to recall 3-4 pump strokes were all that were needed. He also mentioned that the final strokes required 75+ pounds of force!
On the subject of the Titan Mohawk, I recall an article Tom Gaylord wrote about it-I seem to recall 3-4 pump strokes were all that were needed. He also mentioned that the final strokes required 75+ pounds of force!
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WOW! not for the faint of heart.
Yeah, I followed Mac 1 into a build of mine and got my 392 in the mid 700s with 14.3 sadly I gave it a new home and miss it so.
Yeah, I followed Mac 1 into a build of mine and got my 392 in the mid 700s with 14.3 sadly I gave it a new home and miss it so.
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I've got no personal experience with a Titan Mohawk, but with my .25 Aspen it will make 38 fpe with 5-6 pump strokes and it isn't particularly difficult to pump. It really does demonstrate that MPP's can be far more efficient than most are.
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There are some amazing pumpers in the Philippines. Multishot, side pumpers, thumb hole stocks. It's amazing
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The Aspen is basically a PCP with a built in pump. Its got a pressure gauge on the side and what you do is pump it up to its ideal pressure, shoot a few shots and then give it 20 or so more pumps to top it off again. That saves a ton of air because it doesn't empty the reservoir with every shot and I'm sure you could also tune the gun for one or two pumps too, particularly in a smaller caliber. What you can't do with it is get the kind of shot to shot variable power you get from a Sheridan.
From what I know of the Mac1 Steroid Sheridans, they require as many or more pumps than a stock Sheridan, but with 20 pumps they'll deliver something like 25 fpe. They're basically just a Sheridan with beefed up linkage and a bored out reservoir.
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Only a couple of these are still being produced but it's my little collection of pumpers...
Just my opinions based on being inside a LOT of airguns but the Aspen is really close to being a GREAT ... maybe the best pumper of all. It's a little less than durable but maybe could be fixed. I didn't have the same feeling about the Independence... it felt sloppy, rickety, and very short lived. Both are really good ideas with not so great execution. In my little collection, the Sharp Aces reign supreme but the pumping effort can be high for the power. I had a Quigley rifle for a while and it also brought some good ideas to the table. The Phillipine Survival rifle isn't bad either, but pretty heavy. The Dragon is only 10.5 ft lb but interesting. It has weaknesses too. Sportsman is heavy and can can be pretty powerful but pumping effort is high. The Benjis and Sheridans are SO hard to beat but the lack of scope mounting is a pretty huge thing imho... My 140 Custom is incredibly accurate and not too difficult to pump but has a weak valve arrangement... which was addressed one way in a previous post. The old 100 could be PHENOMENAL but the valve is an ancient design that limits power and requires a big hammer hit...
The one I find most intriguing is Bob Stern's Millennium pumper. He used a Discovery and it has some GOOD attributes but the negative one is the two screw breech mounting. I've kept that project in mind but feel a Fortitude would be the perfect base for that project... light with 4 screw breech block mounting and capable of using a Mrod trigger.
I really like pumpers and have had most common ones but two stand out that I've never held... a Heirinkan and one of the old Mohawk multis...
Interesting thread... thanks...
Bob
Just my opinions based on being inside a LOT of airguns but the Aspen is really close to being a GREAT ... maybe the best pumper of all. It's a little less than durable but maybe could be fixed. I didn't have the same feeling about the Independence... it felt sloppy, rickety, and very short lived. Both are really good ideas with not so great execution. In my little collection, the Sharp Aces reign supreme but the pumping effort can be high for the power. I had a Quigley rifle for a while and it also brought some good ideas to the table. The Phillipine Survival rifle isn't bad either, but pretty heavy. The Dragon is only 10.5 ft lb but interesting. It has weaknesses too. Sportsman is heavy and can can be pretty powerful but pumping effort is high. The Benjis and Sheridans are SO hard to beat but the lack of scope mounting is a pretty huge thing imho... My 140 Custom is incredibly accurate and not too difficult to pump but has a weak valve arrangement... which was addressed one way in a previous post. The old 100 could be PHENOMENAL but the valve is an ancient design that limits power and requires a big hammer hit...
The one I find most intriguing is Bob Stern's Millennium pumper. He used a Discovery and it has some GOOD attributes but the negative one is the two screw breech mounting. I've kept that project in mind but feel a Fortitude would be the perfect base for that project... light with 4 screw breech block mounting and capable of using a Mrod trigger.
I really like pumpers and have had most common ones but two stand out that I've never held... a Heirinkan and one of the old Mohawk multis...
Interesting thread... thanks...
Bob
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That is an awesome collection.
I feel much the same about the Aspen. It's a design with a ton of potential that just wasn't implemented well. The efficiency of it, it's accuracy, it's similarity to the Avenger and $300 price should have made it the best pumper of all time, but they just cut too many corners and made it to big and bulky. The really nice thing about a Sheridan in comparison is how light and small and pointable it feels.
Of the multipumps I have handled, the ones that seemed small and light were the ones I enjoyed the most. I think that has to do with the work of swinging the pump handle. On a big gun it just feels more awkward. With springers I feel the opposite and I really enjoy the supermagnums.
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My vote would be a 60's vintage Benjamin 312. I like the Sheridan had several but I liked the Bar-Vee sights or the aperture upgrade on the Benjamins.
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I was just looking at the pump lever on the IZH 46 wondering if a similar mechanism would make an easier pump on a Sheridan ? maybe i will find a junk Sheridan to experiment with ?
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I believe Tom Gaylord had an article about an old Sheridan with an extended lever that dropped down over and past the trigger. It was used for field target. The article was in an issue of The Airgun Review, there were 6 and I’m not sure which one it was.
Unfortunately, my copies were lost during a move.
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Although not quite as extreme as that, Mac1 used to have another modification he would do where he cut the front portion of the stock off just in front of the trigger guard and then moved the forearm back creating a longer pump lever.
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I picked this up from AOA’s used airgun list. It has a Steve Corcoran custom stock and a Mac1 Steroid mod. Unbelievable pumper. I call it the “Machine”. Just so easy to pump and a true tack driver. Had a hunch that someone who would drop $ for the SC stock had it worked over also. Probably, because it was so accurate. And now “I know the rest of the story”.
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It would be awesome if pumpers came off the line like that. I think the only thing somewhat comparable is the c2023 or the dragonfly. Found a sweet looking 1322 on Electrinic-bay up for auction. 
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