I am wanting to try some short 54 cal conicals in my Lyman great plains rifle. It has a 1:60 twist and I have heard that sometimes it will shoot the shorter bullets. It also looks like all of the manufactures quit making them for the 54. I can buy a mould but before I get all set up I am hoping that someone makes them and would sell me some to try out. I am wanting this for a moose hunt and even though a 54 prb might work, I would like to try something a little heavier. Thank you