SpudFiles

Copper is a horrible piston material. However, in a gun with such low forces involved, a copper piston isn't a problem. In guns with worthwhile power, the piston would start to mushroom from hitting the bumper with a lot of force. Also, I believe I was referring to a piston made from solid copper bar.

Anyhow, good job bigbob. Whenever I want a plinker for inside, I just hook up a pressure washer handle and 6' of .257" stainless tube (with a breach loading mech) to my N₂ supply and crank it to 500 psi.

DYI wrote: In guns with worthwhile power, the piston would start to mushroom from hitting the bumper with a lot of force.

So your saying this gun doesnt have worthwhile power
I would say it does, i spent 10min making it and have not spent a penny on it and i am having a lot of fun with it.

Well ive checked the piston after about 100 shots and cant see any wear at all so i dont see a reason to change it.
thanks though

and i have acheived near semi auto with it by having one person on the pump and another loading and firing.
doing that I can let of about five 80psi shots in 10sec

In your case, the piston housing is a softer material than the piston, so it will be destroyed before the piston is.

actually the piston slams back into the metal reducers so...

haha that soda thing was for me , nice.

Well i got sprayed by a bunch of ginger ale in the shot because i didnt expect it to tear that much spraying the contents everywhere so I did it at point blank. But I smell sweet now

Nice once again, Can you take a look at the link in my sig and watch the newest vid? I just wanna see if it's going the right way.

thanks
and sure Ill go watch it