16" cmmg 300 blkout barrel

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hen0302
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16" cmmg 300 blkout barrel

Post by hen0302 » Sat Nov 06, 2021 2:07 pm

This barrel has a carbine length gas tube. I can't find a reload to function the action. I'm using 220 gr. Berry bullets. I've tried A1680 9.5 to 10.5 grs. I just got a can of CFE Black. I also have Shooter's World Blackout. Any suggestions. P.S. new to suppressed reloading.

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dellet
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Re: 16" cmmg 300 blkout barrel

Post by dellet » Sat Nov 06, 2021 10:42 pm

What buffer and spring are you using?

Depending on some other factors, 10.5 of 1680 is on the low end of what I would expect to function.

What was the velocity?
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hen0302
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Re: 16" cmmg 300 blkout barrel

Post by hen0302 » Sun Nov 07, 2021 1:00 pm

Thanks for the response. The spring and buffer are standard for the carbine. Not sure about the velocity. I thought about replacing the spring and buffer. Any suggestions?

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plant.one
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Re: 16" cmmg 300 blkout barrel

Post by plant.one » Sun Nov 07, 2021 1:18 pm

if its a standard spring and a 3oz carbine buffer - something else is wrong


i'd start with checking for a misaligned gas block, or a gas leak somewhere first.
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hen0302
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Re: 16" cmmg 300 blkout barrel

Post by hen0302 » Mon Nov 08, 2021 10:59 am

Thanks. I'll check it out today.

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