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Thread: Favorite CB in a 300blkout bolt gun

  1. #1
    Boolit Mold joel45acp's Avatar
    Join Date
    Jan 2010
    Central Texas

    Favorite CB in a 300blkout bolt gun

    I've been using Hornady 150SST jword bullets in my 16" Remmy 300blkout with a 1:7 twist with exceptional results. First 3 rounds will make a single hole before the 4th and 5th open up the group to just under .5MOA at 100yds. Given that the SST aren't designed to expand at the velocities I'm shooting them (1845fps) what CB would you gent recommend for hunting that'll give 1MOA or so results? I'm wanting to stay with 150g up to maybe 200g+ boolits. I have access to powders and primers of all flavors. I also have about 2k Hornady 30cal gas checks. Thanks in advance.

  2. #2
    Boolit Master

    Hamish's Avatar
    Join Date
    Jan 2011
    Edge of The Crab Orchard National Wildlife Refuge
    Lee 312-155 2R gets a universal thumbs up. Pretty much any of the Lee .30 gas check Molds perform well.

    I personally like Reloder 7, but you'll get lots of answers in that burn range that work.

    This one works really, really good:
    More "This is what happened when I,,,,," and less "What would happen if I,,,,"

    Last of the original Group Buy Honcho's.

    "Salient rules: Heavier the boolit, less twist is needed; more pointed a boolit, less twist is needed; longer the boolit, more twist is needed; the windier the condition, more twist is needed; longer the range, more twist is needed; more of a boattail, more twist is needed; more hollow the point, less twist is needed." ... felix

  3. #3
    Boolit Buddy
    Join Date
    Apr 2015
    South Waikato, New Zealand
    Have a look at the MP 312-159 mould with the HP pins, I have been casting and selling these for seven years
    cast out of very soft lead they expand to .400" at 900fps, most people buy them for subsonic loads but they hold
    together up to 1600fps, accuracy is good usually one hole 5 shot groups at 50 metres subsonic.

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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