I got my Remington New Model Army back in 1980. I don't know how many shots I have put through it, but it has been quite a few over the years. My question is would shooting over a number of years serve to lap out that constriction mentioned? I was told by the seller that it would use a .451 ball, so I bought the Lyman molds and handles and that is all I have ever fired in it. I know a number of the guys here work on revolvers, so have y'all noticed the older .44 Colts and Remingtons from Pietta favored a .451 over a .454?