couple of piston questions

[Pilgor]

I am planning on using a hockey puck as a piston. I have a few questions first.

1) would a hockey puck weigh to much 5.5 and 6 ounces (156-170 g)?

2) A hockey puck is 1" thick, would it be thick enough?

These are probaly the last of my noob questions, thank you for all who helped me.

[pat123]

Yes it wieghs to much. and i don't think it is thick enough. it really depend on your gun design.

[pizlo]

This is for a Coax? And lighter is always better I suppose you could bore out the back and add a sealing face to it, but why not just make one of wood, or another light material?

[bigbob12345]

no even close to thick enough
the thickness sould be equal to the length at least.

But a couple hockey pucs screwed together should do the trick

[pat123]

But a couple hockey pucs screwed together should do the trick

way to heavy i think.

[bigbob12345]

true
so I would just reccomend a better piston material,peanut butter jars fit in 3in pipe(same size as hockey pucks)fill it with expanding foam and you should be good to go.
I got that from this other guy that did that,ill see if I can get a link