Ruger offsets the bolt notches, does away with screw-on side plates, doesn't leave a weak spot on the back of the barrel at 6:00 like a K-frame and perhaps most important of all latches the cylinder closed at the crane as well as the back of the cylinder. That last factor can sometimes prevent a KB! if the load would otherwise have shaken the cylinder loose from it's lockup state. (And yeah, that does happen now and again.)
And then when they do cut loose, they don't spray as much metal around.
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Jim March
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