Monac
Member
The Sportsman/Model 999 frame is descended from H&R's 38 S&W line of top-break revolvers, and a 38 S&W version of it was made into the 1970's at least, as the Model 926 (4 inch barrel only, with manual ejection for some reason). I cannot believe that Stingers were too powerful for it in some way. OTOH, it is strange that a burst rim caused this problem. This is exactly the kind of thing rebated chamber mouths are supposed to prevent.