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Thread: 300BLK and 20rd mags

  1. #1
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    300BLK and 20rd mags

    Putting it here instead of the magazine forum because it does concern an other-than-5.56 caliber.

    Are 20rd mags an issue with 300BLK? How about 20rd PMags?
    11C2P '83-'87
    Airborne Infantry

  2. #2
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    I just switched to 20 round PMAGs for my 8.5Ē Suppressed SBR. Zero issues for me.

  3. #3
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    Quote Originally Posted by CPM View Post
    I just switched to 20 round PMAGs for my 8.5” Suppressed SBR. Zero issues for me.
    Same with me, except with my 10.5 suppressed SBR.
    RLTW
    Danger Close Knows No Atheists.

  4. #4
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    20 rd P-mags and GI are what we use with 3, 16” guns.
    Zero issues.

  5. #5
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    Gen 3 20-rd PMAGS and 20-rd Colt mags work fine for me with 110 gr TTSX.

  6. #6
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    I have only used 20 round PMAGs for my Blackout upper and have had no issues either. Shooting primarily Sig Match ammo.
    Open the pig!

  7. #7
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    I only use Lancer 20 and 30 round mags for 300 blk to make sure I donít accidentally load one with 5.56. They work fine subs and supers, including my hand loads.

  8. #8
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    Use 20's and 5's to zero on the bench mostly. No issues at all.

  9. #9
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    I only use my motley collection of metal magazines for .300blk to avoid sticking one in a 5.56 gun. Zero issues in my 16” carbine or 8” pistol with 20 round magazines dating from Viet Nam era to recent Brownell’s mags.

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