A friend bought a used S&W 629. I can NOT make it shoot with anything.
I slugged the bore at .4294" and the throats at .4336". I tried over size boolits. It still does better with 240 XTP's.
I never had trouble with my old 29's but this one just rubs me wrong.
Then the cylinder unlocked and went backwards so the next shot was a "click." I did not have a stronger cylinder stop spring but found a tiny spring that fit inside the other. It stopped the cylinder reverse.
I don't know if any of you have seen the .500 S&W double with the first shot with the cylinder full but there are videos out there. The cylinder unlocks, goes backwards and hammer bounce will fire the round. Seems as if it is only safe with an empty chamber under the hammer.
Accuracy with this 629 just plain sucks!