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Less recoil, and improved accuracy. At the price of power and speed. Ohh, and some time and money! :)

That is exactly why I took apart the first gun and play with: some said that a lighter piston will increase speed. So i learned how is just the opposite. And, as retired, have some time to skin the cat!! :)

You put it very well: is the juice worth the squeeze! I guess not, not for me, anyways. Have lightened the pistons on my guns and they have less recoil. Am new to this myself. Is just curiosity. The HW 97 piston is 205 g. from 260 factory. It reduced the speed about 30 fps. With Vortek Steel...

Now am sure not to get into this. :). Not worth it, at least not for me. Thanks for the clear depiction of the trigger mod. And that sure is a nice gun rest!! :)

Am retired machinist, and have access to a machine shop. Although, wish they had a better lathe...:) Am playing with my guns just as a challenge and curiosity. I like how my HW 97 shoots now with a much lighter piston. I guess will have to give up on skirtless. It may be great for target, but...

Am not sure if worth the trouble. Can make the piston as light as possible, by leaving just enough material to guide the latch pin. Already have it way lighter than factory. But the perspective of skirtless , therefore guideless, is appealing. :)

That is what am looking for. Don't know how it is called, but yes, a rod with round hook. That i can deal with. Just wonder about the adjustment on the trigger.

97. You can, but the latch pin has to be round. That was my question!

The skirt is to guide the rod to latch. Without that guide, the latch will not line up. That is my question: will the trigger work?

The long skirt of the piston has the sole role of guiding the latch. Without, the latch hook has to be round. Was wondering if the trigger will work without alteration.

Anybody that has a skirtless piston, and the latch rod is rounded, will the factory trigger still work?

All worked out. Like the way it shoots with spring. The spring guide and top hat are guided as well. In the pic. the guides are steel, but made them from delrin as well. With this lighter piston shoots smooth 820 fps with Premier 14.3 pellets, and fairly accurate. Still need to try with factory...

Finally got the spring to replace the ram on my Gamo Bonne Collector. Ordered a strong spring with .152 Dia. coils. Am happy with the results. 820 fps with Premiere magnum 14.3 gr. When will miss taking the gun apart, will try with factory piston and different seals. Maybe even shim the spring.

Absolutely! Question was why get a 25 mm piston and compression chamber when you can just make a 26 mm piston lighter. 1 mm smaller piston is not much lighter, unless, is skirt less :)

You can buy or make a 26 mm piston lighter. What speed do you get with a 25mm piston?

I found out for sure that the ram is leaking! Trying to figure out at what weight it starts compressing on a bathroom scale :) At one point i felt a spray. It may be when the pressure is not perfectly straight on. Still works well enough. Before i buy a new factory ram, will play with helical...

If is a scope killer, why not go back? If you want that extra 70 fps, can get a stronger or longer spring, or just shim it up a little. Hope you don't mind me asking. What caliber and what speed did it have factory? Mine is a Gamo Bonne Collector Gen.3 in .22 cal. With a 14.66 gr. Premier...

Thanks for the suggestion. That Omnistorm ram sure looks appealing. Will be some time before price will be reasonable, since many will want to experiment with it. Am new to air guns, and find it a interesting hobby. Made a lighter piston just to prove that it will slow down the speed of the...

With a spring activated airgun one can increase or decrease the power by adding shims or cutting off the spring. With NP activated gun you are stuck with whatever the nitro piston offers. Options would be a custom NP spring, but are there any that manufactures them? Or, replace the NP with...

Have finished the piston mode was working on. Is much closer to diameter than factory piston. And much lighter. Better inside lead for the ram rod. And since i was at it, changed the seal to a Weihrauch style. During the testing process, tend to believe may have damaged the gas ram by hitting...