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Thread: 300 Blackout

  1. #1
    Boolit Master Stopsign32v's Avatar
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    300 Blackout

    What barrel brand and what lengths are you guys running with good success? I'd like a 10.5 barrel but can't decide on which brand.

    Just ordered the only MP 311-410 HP mold I could find. Paid $175 shipped for it (ouch) but it's better than not having one at all I figured.

  2. #2
    Boolit Buddy Krh1326's Avatar
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    It seems that mold is hit and miss with some guys. I just got the other one.. 312159 HP has some feeding issues, but am working on it. I have high success ( most do ) with that Lee 312-155… I’m hearing the 312-160 too.

  3. #3
    Boolit Grand Master popper's Avatar
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    Mine is KAK, works fine. 1:8 twist and threaded. IIRC it was a value line on sale, nothing special. I don't shoot subs so anything shorter you lose a lot of fps. Noticed they are out of stock.
    Whatever!

  4. #4
    Boolit Buddy 1006's Avatar
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    Mine is a 16 inch, carbine gas system, 1 in 8 twist, made by Trybe Defense, sold at Optics Planet for less than $100.

    I have only shot jacketed bullets in it. It works great with subs or supers, but it is a 1.5MOA barrel at best with the loads I have used.

    I was just looking for a bargain when I bought it.

  5. #5
    Vendor Sponsor
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    I started with a 16" Odin Works barrel. Switch to a 10.5" when I went suppressed. Both barrels were 1 MOA with a 125gr Spitzer. I am still trying to achieve that with my cast.
    Odin Works barrels are a bit pricey but come with an adjustable gas block.

  6. #6
    Boolit Master
    am44mag's Avatar
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    I'm slowly getting ready to do a 300 BLK build myself. I was thinking of going with something around 8" long, probably from Ballistic Advantage.

    I have a NOE 311-206-RN plain base mold on the way.
    ______________________________________________
    Aaron

  7. #7
    Boolit Bub
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    Quote Originally Posted by Krh1326 View Post
    It seems that mold is hit and miss with some guys. I just got the other one.. 312159 HP has some feeding issues, but am working on it. I have high success ( most do ) with that Lee 312-155… I’m hearing the 312-160 too.
    We have two 16" 300 blacks in the household. Both are Palmetto uppers. Both are dedicated to the Lee twins (powder coated 312-155 and 312-160s). Cheaper to load and shoot than 5.56.

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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