Question for the good folks here. After approx 50 rounds of standard 38 ammo my Rossi 351 trigger locked up on me when I pulled the trigger. What fixed it was to just pull the trigger again and fire the round. This happened to me twice at range. I brought it home and cleaned it but it still happens occasionally when I push cylinder out and dry fire it (not in that habit but need to figure this out) but only after first try, never on second. It always functions find after first try. My guess is that it has something to do with the thingamabob that sticks up above the trigger between the frame and cylinder. Anyone have any perspective on this anomoly? I may need this weapon in a pinch and would hate to see this happen.