Home Forums Reloading Bullet Casting 454 / 45 colt ammo question?

I have a 454 tha I shoot 45 colt cowboy loads in when plinking. The 454 are so expensive, rough to shoot and loud that the 45 is a comforable alternative. The problem I have is that the 45 loads make my gun so dirty when I shoot onlya a few rounds that it is a pain to clean. Is there a 45 round out there that doesnt do this? Only a few rounds makes my gun black with powder.