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Thread: .300 blk 101 question

  1. #1
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    .300 blk 101 question

    Does .300 blk use magnum pistol powders for subsonic bullets and rifle powders for super sonic?

    What primers?

    Was just pondering a Mini-14 in .300.

  2. #2
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    Magnum pistol powders like H110/Win 296, 4227, 300-MP work well will both. I've read about some folks using rifle powders like 4198 but never tried it.

    I've only ever used small rifle primers (CCI or Federal).

  3. #3
    Join Date
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    H110/296 and Lil Gun works well too. I just use any spp I can find. Never had any slam fires with an floating fp AR platform. I would just make sure to get a seating die that straightens the bullet prior to insertion. I have had a lot of issues with the subsonic bullets not seating straight until I switched to a Redding type s die and have been gravy ever since. I can reload a nice round from .33 to 1 dollar for a killer sd round. Sure beats the 1-4 dollar range for factory.


    Sent from my iPhone using Tapatalk

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