I recently just picked up my muzzleloader and the barrel was rusted pretty bad. I have cleaned it and there are considerable amounts of pitting. It is a .45 cal winchester X-150, I know the gun is not worth much anyway, but I just dont like to get ride of any of my guns. My question is, can this barrel be bored out to shoot .50 cal bullets? The barrel seems plenty thick enough, and how much do you think it would cost? Thanks for your help.