I recently was given A 5 1/2" 1858 New Army (courtesy of Cabelas recent sale) as an anniversary gift. I ordered an R&D stainless .45 Colt cylinder for it almost immediately. I finally got to the range today and I love this gun. Lots of fun to shoot, but slow to reload. The cylinder fits really tight, especially loaded. It takes some work to get the cylinder to slip in. I did notice it was getting better after the first box of shells. I've been lurking here awhile and learning a lot, I sure am glad I found this place.