cement slug.

[mouz]

i will cast some cement slugs tomorrow. we'll see how they do.

[Forum Admin]

I've always wanted to fill a tin can with cement and launch it with a potato cannon.  If you can get a good cast, they should be pretty good ammo. Explode with a puff of dust when they hit a hard object.

[FighterAce]

I just tried casting a plaster slug from a small rifled section of barrel. When I got it out, it had really nice rifling grooves on it. I tried to put it in a longer piece of barrel (same barrel I took the small section from)... it was a really snug fit. Sealed 100% too but there was too much friction. You'd need at least 20 bar to fire that thing 
Since I dont have a pump I just used a piece of all thread to get it out... the slug broke in the process.

I hope your cement is a lot harder then my plaster   

[mouz]

i just realized that the cement got thrown away at some point.

[mouz]

just bought 80 pounds of cement for $6.

[paintballarmsdealer]

just bought 80 pounds of cement for $6.

concrete mic or cement/sand mix or just plain cement?   Remember your going to have some shrinkage 15 % to 20 %
are you going to wax coat these so the do not scare the barrow? inquiring minds want to know

[mouz]

the wax is a good idea, i'll do it. its mortar mix( cement and fine sand), plain cement was more expensive.

[boar]

Since I dont have a pump I just used a piece of all thread to get it out... the slug broke in the process.

[/quote]
might try adding some fiber to your plaster mix  not sure what to suggest but maybe corn starch or fine sawdust might make that sofr plaster hold up a bit better

Boar