You'll just have to try and see. I've shot .44Mag up to 1333fps and no leading with standard 15BHN hard SWCs when testing 2400. I know some use the harder Oregon Trail bullets at Mag velocities too. Never have used a gas check on any of my lead bullets.
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A clinger and deplorable, MAGA, and life NRA member. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes colloquially referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. That said, the .44Spec is right up their too... but the .45 Colt is still the king.
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