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Thread: Shortest 300 BLK AR magazine?

  1. #1
    Boolit Master Recycled bullet's Avatar
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    Shortest 300 BLK AR magazine?

    I am wondering about shorter length 300 Blackout specific magazines. I am shooting 225 grain powder coated lead bullets through a Ruger American Ranch Rifle. My rifle has the magazine well to accept standard AR-15 magazines.

  2. #2
    Boolit Buddy
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    I think standard COAL for the ar 15 is 2.62

  3. #3
    Boolit Master Recycled bullet's Avatar
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    These are the two I'm looking at from gun mag warehouse.

    I want the mags to not stick out so far from the bottom.

  4. #4
    Boolit Master Recycled bullet's Avatar
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    Quote Originally Posted by Fitz View Post
    I think standard COAL for the ar 15 is 2.62
    Thank you for your response. I meant short in the height not length of the magazine.

  5. #5
    Boolit Master Recycled bullet's Avatar
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  6. #6
    Boolit Master elmacgyver0's Avatar
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    I like short mags too.
    They also keep you from shooting up all your ammo so fast.

  7. #7
    Boolit Master

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    *LOL* I just put 5 rounds in the mag and don't worry about how much hangs down underneath!

  8. #8
    Boolit Buddy steve urquell's Avatar
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    Quote Originally Posted by Recycled bullet View Post
    I am wondering about shorter length 300 Blackout specific magazines. I am shooting 225 grain powder coated lead bullets through a Ruger American Ranch Rifle. My rifle has the magazine well to accept standard AR-15 magazines.
    This ProMag COL21 says "flush fit"
    Click image for larger version. 

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    https://www.theshootersbox.com/AR-15...e_p_17777.html
    Attached Thumbnails Attached Thumbnails Screenshot_20240220_193439_DuckDuckGo.jpg  
    Last edited by steve urquell; 02-20-2024 at 09:41 PM.
    Dan Wesson 744V .44mag, S&W Mod 19-4 .357 , Stevens 200 .223

  9. #9
    Boolit Grand Master

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    I would go with the Lancers. The magazine is a pretty important piece of a semi auto. I have zero confidence in Duramag or Promag quality. Also, try to find physical dimensions in the advertising. Many 5 and 10 round magazines are just standard 20 round mag bodies blocked to lower capacity.
    ”We know they are lying, they know they are lying, they know we know they are lying, we know they know we know they are lying, yet they are still lying.” –Aleksandr Isayevich Solzhenitsyn

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  10. #10
    Boolit Master
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    I use 10 round Pmags.


    Sent from my iPhone using Tapatalk

  11. #11
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    Texas by God's Avatar
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    Quote Originally Posted by sukivel View Post
    I use 10 round Pmags.


    Sent from my iPhone using Tapatalk
    ^^ This^^^
    They don’t stick out much and always work.


    Sent from my iPhone using Tapatalk

  12. #12
    Boolit Buddy
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    Quote Originally Posted by Texas by God View Post
    ^^ This^^^
    They don’t stick out much and always work.


    Sent from my iPhone using Tapatalk
    +1

    When’s the like/thumbs up button going into effect?

  13. #13
    Boolit Master
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    10 Round Pmag for range unmodified for 5.56 and 300, when you get into big pills on the 300 you need to file/sand but no big deal. And then there are the ten rounders I have modified for my hunting 450BM/458, they have worked flawlessly for me!

  14. #14
    Boolit Grand Master popper's Avatar
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    I use 10 rnd Lancers but have a single shot mag also. Actually just blocks the mag well and you drop one in the ejection port.
    Whatever!

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check