I have been firing some cast bullets through mine and like yours the first few inches in front of the chamber are a little rough. So far no problems with leading. Tried black and smokeless powder along with 535gr bullets cast of 20-1. Bullets were to heavy and the recoil is pretty stiff. Going to try some 405grs next. Thanks for the info on the records. I thought I might have gotten a hold of someone who just didn't want to spend the time to look them up. Now if I could just get someone from Boss to answer an Email.