Morning Fellas. New to the forum *wave* and wanted to chime in on this particular topic. Title says CMMG Banshee and brass bulges, verbatim for my search terms earlier tonight and how I came across this site. I'm comforted in knowing this brass getting plump around the base is not unique to my new pistol, nor the experience with customer service being tardy or non-existent from the company itself.
I'm new to the forum but not to firearms. New to 10mm but not 9. New to PCC's but not pin and weld shorty Ar's and so forth. Also, only just scratching the surface of reloading so if I say something ignorant, just do me like Skipper did Gilligan with the hat and we'll keep pushing. The world has enough thin skinned soy boys.
Got my MK10 around the 4th of July and the state in which I live immediately shut down the areas known for target practice until just this month for "fire danger" and "habitat recovery" which actually means there are a lot of Subaru foresters up the road at the trailhead with recent Cali transplants walking around with ski poles and imported politics in the summertime.
I was able to squeeze in one quick 2 mag range trip just to check function and had all that time in between to stare at this dirty grapefruit cup full of deformed brass. Thinking to myself in my limited knowledge "that don't look good". Some cheapy S+B 180 grain fmj that isn't visible really on up to Underwood 135 Nosler and 155 XTP that looks like a pear as someone here mentioned. The worst case I found in the 60 I let off was pushed out to .456" (XTP). I love this gun and all I could do really was read reviews and try to get a hold of our boys in the "Show Me" state. The best next step I concluded was to try other loads of course but I love Underwood and it has never been an issue with any other cartridge and dangit, I bought this thing because it's supposed to be "the one". I converted my G21 to 10mm with a lone wolf slide and got mags to match, created a system or "perfect pair" as they called it on Iraq V 8888.
So after all that thinking, I secured their 8 Oz. buffer and finally was able to go out last week with the same loads. Although they still swell up a bit, the worst deformation is down to .433" The thing runs flawlessly. I believe slowing it down did the trick. Holds open on Glock, ETS and SGM mags, 100% cycling even with the S+B. Recoil is soft like..with the heavy buffer there are almost stages to the recoil impulse. Almost feels slow like a very light load in a Benelli auto, but still capable of dumping rounds as fast as you pull it. The Banshee is sexy in bronze and quick with the 510 Holosun, wield-able I can imagine, half asleep in your drawers in the hallway chasing the bump in the night. Accuracy at 35 yards is 2" for me, good enough. By the end of the day I was hitting range leftovers at 50 yds. Small pumpkins, clay pigeons, Skoal containers. It's a fun weapon and after 600 rounds or so, it's next to my bed at night with a PL Pro Olight at 2 o'clock.
I'm new to the forum but not to firearms. New to 10mm but not 9. New to PCC's but not pin and weld shorty Ar's and so forth. Also, only just scratching the surface of reloading so if I say something ignorant, just do me like Skipper did Gilligan with the hat and we'll keep pushing. The world has enough thin skinned soy boys.
Got my MK10 around the 4th of July and the state in which I live immediately shut down the areas known for target practice until just this month for "fire danger" and "habitat recovery" which actually means there are a lot of Subaru foresters up the road at the trailhead with recent Cali transplants walking around with ski poles and imported politics in the summertime.
I was able to squeeze in one quick 2 mag range trip just to check function and had all that time in between to stare at this dirty grapefruit cup full of deformed brass. Thinking to myself in my limited knowledge "that don't look good". Some cheapy S+B 180 grain fmj that isn't visible really on up to Underwood 135 Nosler and 155 XTP that looks like a pear as someone here mentioned. The worst case I found in the 60 I let off was pushed out to .456" (XTP). I love this gun and all I could do really was read reviews and try to get a hold of our boys in the "Show Me" state. The best next step I concluded was to try other loads of course but I love Underwood and it has never been an issue with any other cartridge and dangit, I bought this thing because it's supposed to be "the one". I converted my G21 to 10mm with a lone wolf slide and got mags to match, created a system or "perfect pair" as they called it on Iraq V 8888.
So after all that thinking, I secured their 8 Oz. buffer and finally was able to go out last week with the same loads. Although they still swell up a bit, the worst deformation is down to .433" The thing runs flawlessly. I believe slowing it down did the trick. Holds open on Glock, ETS and SGM mags, 100% cycling even with the S+B. Recoil is soft like..with the heavy buffer there are almost stages to the recoil impulse. Almost feels slow like a very light load in a Benelli auto, but still capable of dumping rounds as fast as you pull it. The Banshee is sexy in bronze and quick with the 510 Holosun, wield-able I can imagine, half asleep in your drawers in the hallway chasing the bump in the night. Accuracy at 35 yards is 2" for me, good enough. By the end of the day I was hitting range leftovers at 50 yds. Small pumpkins, clay pigeons, Skoal containers. It's a fun weapon and after 600 rounds or so, it's next to my bed at night with a PL Pro Olight at 2 o'clock.