What is a good alterative to the T/C Maxi-ball. the really seems to like conicals, I belive it has a 1 in 28 twist barrel on it. I know T/C used to make bullet molds in larger sizes than the standard 502 diameter, like a 504, 507,or 512, but they are HARD to come by these days. I'm looking fo r a good deer, elk conical that I can use here in Colorado.