The story of 2 432UCs

[txmiller]

I purchased two 432UCs two months ago.
#1 was perfect in all ways - sights, trigger, shoots to point of aim and functuned flawlesssly with 7 different manufacture's loadings.
#2 was a different story - It had light strikes approx 20% of the time while firing over 100 different loadings from 7 different manufacturers. Off to S&W it went for repair (shipped Oct 14th).
It is scheduled to arrive back home this afternoon. I think a turnaround time of under 4 weeks is great. BUT! When I called S&W and inquired as to what work was perfromed I was told they realigned the barrell and replaced the yoke. I'm new to this revolver game and this was the first time I've ever sent anything back to S&W, but I'm not sure how the two changes they made will address the light strike problem. Could someone with more experiance please weigh in? I'm shooting it again this Saturday so time wil tell.

 

[stansdds]

My guess is that the yoke was allowing too much cylinder fore-aft play, which is called "end shake" in revolver parlance. This would create excess space between the back of the cylinder and the recoil shield. This excess space means more distance between primer and firing pin, so the pin would deliver light strikes. A new yoke that keeps the cylinder further back also creates more gap between the front of the cylinder and the barrel, so the barrel has to be turned into the frame a little more to compensate for the increased barrel-cylinder gap.

 

[Bastogne71]

My 432UC went back twice for light strike misfires. Each time they replaced the firing pin but that did not solve the problem. I replaced the hammer spring with a standard 8.5lb spring and it has worked flawlessly since then. I’ll have to put some more rounds down range before I trust it enough for carry,but I’m optimistic that it’s fixed.