The 629-4 had the durability/performance enhancements so there should be nothing to worry about if you are running top published loads. In the long run, I'd certainly guess the SBH may be more durable, but that would likely entail a LOT of shooting. I think the 629-4 was one of the best of the 29 series ever made, everything you want and nothing you don't.
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" I said, good DAY! "
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