I appreciate your comments. Not trying to steer anyone along the wrong path. It is just that in over 40 years of shooting cap ‘n ball revolvers (and I have owned, sold, bought, and traded many over the years, including a Ruger Old Army), I have never had a fitment problem with Remington No. 10 caps. On the other hand I have had numerous problems with CCI and RWS caps. Like I said, just my 2¢.