I have been shooting .40/65 Starline brass in my Browning 1885 .40/65 Rifle. A knowledgeable friend told me that that was the wrong thing to do, that I should be shooting Starline .45/70 necked down to .40/65 then trimmed. He said I was probably building up a Carbon ring in the front of my chamber. Lo and behold he was right and I did have a substantial Carbon ring. What is the sites "brains" opinion on how to get or make the best brass for my Browning .40/65