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by more_corn 1176 days ago
It’s technically possible though. The case of 38sp -> 357mag is a working example. The cartridge is longer and pressures higher so you don’t want to load a 357 into a 38 (and often can’t). But you can run 38sp in your 357 all day long.

One warning I received from my gunsmith though is that you’ll want to clean the barrel super well when switching so the powder ring of the longer round doesn’t cause problems. Hasn’t blown up in my face yet. Will report back if that changes.