The question of relative durability of steel versus alloy-framed handguns will likely be asked forever. Common sense tells you that the steel gun will survive a higher round count, all else being equal; and the fact is, these guns were designed to be carried much and shot little. But I would say that your hand is more likely to fall apart before an alloy-framed J-K-or-N-frame will if you're shooting full-house loads, so the overall question is really pretty moot.

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Pisgah