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I have a 9mm Ruger LCR that sticks when ejecting spent rounds. If I feed 115 grain Blazer FMJ into it, brass casing has zero problems ejecting. But the same ammo in aluminum casing requires an excessive amount of force to eject the empty casings. I have to rap the ejector on the table to eject the rounds.

I have zero problems feeding the same Blazer 115 grain FMJ aluminum ammo into other guns, so this looks like an idiosyncrasy of this one revolver rather than a problem with the ammo.

Any idea why this happens? I can easily stick to brass cased ammo for this one gun to "fix" the problem, but I'm still curious what's causing this.

I have a 9mm Ruger LCR that sticks when ejecting spent rounds. If I feed 115 grain Blazer FMJ into it, brass casing has zero problems ejecting. But the same ammo in aluminum casing requires an excessive amount of force to eject the empty casings. I have to rap the ejector on the table to eject the rounds. I have zero problems feeding the same Blazer 115 grain FMJ aluminum ammo into other guns, so this looks like an idiosyncrasy of this one revolver rather than a problem with the ammo. Any idea why this happens? I can easily stick to brass cased ammo for this one gun to "fix" the problem, but I'm still curious what's causing this.

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[–] • 4 pts

Aluminum expands more than steel or brass cased ammo. Causes the extractor claw to not be able to grip as designed, or causes the case to swell to it's harder to pull out. I've experienced it with one of my more finicky guns. Not much to say other than you can try to get a beefier extractor claw installed, or just accept that your gun doesn't like tin can ammo.

[–] • 1 pt

Thanks, that makes sense. I'll just use brass-cased with that gun. Easy enough to do since aluminum is exclusively for plinking.