Tam makes a mistake any of us could have made. Most quality guns will gobble up and spit out any decent ammunition we feed it. However, on occasion there is the rare gun that is picky about what we feed it. The first I ran into was the Seecamp .32 auto that was designed specifically for Winchester Silvertips.
When dealing with guns that are slightly out of the ordinary reading the manual can help point out any unusual quirks they may have. Most of us (myself included) just want to get out to the range and start blasting, but sometimes it really is better to RTFM.