Also try to stick to standard-pressure ammo. For example, there is no SAAMI spec for +P (higher pressure) .45 ACP and .40 S&W ammo. The is a SAAMI spec for +P 9mm ammo, but there is no spec for 9mm +P+ (even higher pressure) ammo.
Like RickB said: stick to standard, reputable American manufactured ammo and you'll be fine. And for range shooting, if you avoid any +P or +P+ ammo you'll be sure you're always practicing with ammo that's within SAAMI-specced pressure.
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0331: "Accuracy by volume."
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