how to make a rimmed cartridge rimless
I am new to this form but not new to firearms. For a long time now I have wanted to build my own wildcat cartridge. I was thinking of taking a .45 long colt and necking it down to a 9mm opening. I think that this could be a hot little round and would be great for a carbine. But the only problem is that as you all know, the long colt is a rimmed cartridge and although I could still use it in a rifle, it has the potential to jam A LOT with rim lock. So I was just wondering if there was an easy way to remove the rim to make it a rimless cartridge that would work with a rifle better. Also, I know that doing this is expensive, but no one has really give me an estimate, how much does it really cost to have your own personal bullet made and a gun to fit it?