I just recently bought a Ruger New Vaquero. It doesnt say so, but the way the grips are set up, I believe it is a Bisley, but the etching on the barrel just says New Vaquero. It is chambered in .45 LC. I was wondering if it is alright to shoot lead bullets out of it as they are about all the I can find in my price range. Also, what is the highest grain I should run through it? Is there a limit? (I know within reason, not talking about 6,000 grain or anything ) Thanks in advance for all your help everyone!