Posted: 12/28/2025 5:00:15 PM EDT
[Last Edit: Techsan02][Edited]
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Shot some of these out of a cmmg banshee yesterday. Don’t have the box anymore, so not sure what lot. Bought 4ish years ago. Attached File All bulged, pic doesn’t show it well, case 4 has a split. Attached File |
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| What's your point? Seems more like a gun problem (chamber support, or more specifically, lack thereof) than an ammunition problem. |
Posterity! You will never know, how much it cost the present Generation, to preserve your Freedom! I hope you will make a good Use of it. If you do not, I shall repent in Heaven, that I ever took half the Pains to preserve it.---John Adams
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I'll second lack of support almost a OOB premee detonation. I get them in once in a while in my Lage 10/31 upper for my trasferable M10 I call them belted 9mm magnum.  When I get them consistently on the factory M10 upper in 45 acp I pop a new barrel in and it goes away for another 20-25k rounds. The M10 will also crack the cases like your pic. I guess in your case you are getting belted 10mm magnums See if it does it with other rounds and proceed from there. I see a new barrel in your future. |
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Originally Posted By intheburbs: What's your point? Seems more like a gun problem (chamber support, or more specifically, lack thereof) than an ammunition problem. The half dozen other brands of ammo don’t have that issue. Neither have subsonic to maxed out reloads. |
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Originally Posted By nvcdl: Are you using a Gen 2 Glock? I had a Gen 2 Glock 20 but replaced the factory barrel with a Lone Wolf for my hand loads. CMMG Banshee Found this on CMMG's site: https://support.cmmg.com/10mm-case-bulging |
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Originally Posted By Techsan02: CMMG Banshee Found this on CMMG's site: https://support.cmmg.com/10mm-case-bulging Looks like CMMG admits their chamber isn't fully supported - more of a gun issue than an ammo issue. Gen 2 Glocks in 40S&W had issues blowing up for same issue. |
