Does anyone know what could cause casings to split like this? 38. Special, these were older rounds we fired off to use them up before the new ammo and almost all of

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38 special case cracked on factory ammo?

Does anyone know what could cause casings to split like this? 38. Special, these were older rounds we fired off to use them up before the new ammo and almost all of

Looking at an EDC revolver anyone have one of these or recommend another model? S&W Airweight : r/Revolvers