How well do the aluminum cylinders hold up under heavy usage? If I were to get a 617 I would expect to put a huge number of rounds thru it. Do the ratchet faces wear quickly, and do they sleeve the cylinder for the center pin assembly? On a 317 I could see low to moderate round counts, but the 4"-6" 617's, 63's, heck even 34's seem like a perfect candidate for very high round counts due to the low cost of ammo and typical plinking enthusiasm.

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Hastings