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AR15.COM
12/29/2025 3:12:48 PM EDT
[Last Edit: Techsan02][Edited]
@CMMGinc

Please see linked thread below. Any work around for this? Updated, upgraded barrel?  High powered ammo is getting a significant bulge, and a split.


https://www.ar15.com/forums/handguns/Underwood-10mm-200gr-xtp-cases-bulging/20-218226/
[Insert creative words here]

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