RE: Colorado Elk hunting help...
I cast a 525 grain bullet for my 50 caliber. I pour it from a RCBS Hotchkiss adjustable mold. I shoot 120 grains of 3F blackpowder behind it. The load is a real kicker, but it is deadly on elk. I will have to measure it to see if it is less than one inch. I have hunted with the bullet in Colorado, I better measure it.
Buy a good mold and cast your own. Go with as heavy of a bullet as you can, the heavier the better. Keep your accuracy under two inches, and you are ready to go. Tom.