take 86% water and 14% saw dust by weight mix it poor it in a mold freeze it. its called pykrete. look up a video i think it would be a good ammo Mechanical properties Ice Concrete Pykrete Crushing strength [MPa] 3.447 17.24 7.584 Tensile strength [MPa] 1.103 1.724 4.826 Density [kg/m³] 910 2500 980

i wasnt planing on using it. it was just a therory

say you have a barlle sealling piston cannon. if you make the piston auto sealling and make a floating o-ring ram rod. could you pump your cannon using the ram-rod in the barrle and the piston as a check valve?

how do you lite it

i figured it out

co-axil barrle sealing piston

dead volume? outer diameter? seat diameter? piston mass? projectile friction?

how dose 1 times 36 get 28

i want the chamber 60" the barle 56.5"

how do i take a screen shot? i dont know what alot of these numbers are for? whats a seat? how do i know the friction on the projectile?

my first time using ggdt how dose it work i dont know all the info it wants the barrle 1in the chamber 2in the siton 2in ? why wont it work

im trying to use ggdt it keeps telling me the barrle is exesivly long when its shorter than the chamber?

that makes more sense

ok so a few seconds ago i made my first post and i got spud buxs for it? what are spud buxs

so im making my first pneumatic cannon. its going to be a co-axil piston gun. i want to use a 2inch chamber and a 1inch barrle. i dont know if there is a high enuf chaber to barrle ratio for good performance. just want to know if it will work