Here is the test block of soap with a .22 cal Hobby fired backwards and forwards.... entering the block from the bottom....



and here is the reversed Hobby recovered from the soap.... Impact velocity about 430 fps....



Congratulations Al, that pellet has the distinction of being the only pellet I have shot at non-PAL velocities into melt-and-pour soap that showed any expansion.... and it turned inside out so completely it nearly blew a hole through the middle....

The other pellets, entering from the left, are a .22 cal JSB Express and a .30 cal JSB Exact, both impacting the block at about 470 fps.... The .30 cal has an SD about 64% greater.... and the penetration was about 55% greater.... pretty good agreement with theory.... It shocked me how close that .30 cal pellet came to blowing through that 3" of soap....

Bob