I bought a pair of the 5-1/2" brass framed models the last time they were on sale at Cabelas. I already had a pair of the steel framed model with 7-1/2" barrels but I wanted to see how the brass frames would hold up and I wanted the shorter barrels. The only modifications I have made to date is to install Tresso nipples and a plug on the hammer faces to make them smooth. I have used them in two matches so far and have had NO problems at all either mechanically, with ignition or cap jams.
I plan to make them my main match pistols and see how they hold up.