My 1894, when it was a 44 mag used to scrape up the brass when chambering, and you could feel a little drag. There was a slight burr around the chamber edge that was the culprit, small enough that I had difficulty seeing it but could feel it with the end of a paper clip. A tiny bit of filing took care of the problem, no more nicked up brass. Now that it is a 45, the chamber is so big those cartridge just fall into the chamber, smooth as all get out! ;D