Yesterday, I had my RRA upper and Hahn mag block running side by side with a Colt SMG. I tried three different rounds through the guns, including Winchester's Ranger 147gr JHP (RA9T). At first, I thought the RRA wasn't feeding properly but the Colt didn't like the hollowpoints either. In both cases, the hollowpoints seemed to stop on their way to the chamber. They seemed to make it across the magazine block and then hang on the way to the chamber. The guns seemed to run fine on FMJ ammo. Is this typical performance? My gun is a training gun and will only get FMJ but I was curious.
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