I got lucky on the rimfire alternative. I used a small charge of green dot (I think) to form cases for my .218 mashburn bee. Just for the heck of it I shot them and accuracy was pretty decent. Like others, I found that it is just about on target if I use the top of the bottom vertical duplex post at 50 yards. I used hornady bee bullets with the big hollow points so i can tell them apart from full power loads. I think velocity is higher than .22 lr though. getting down close to 1100 fps might be tricky with my simple methods and jacketed bullets.
The .444 big bore squirrel blaster is a cool idea!
