300 AAC BlackOut Loads...

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  • billybob44

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    Sep 22, 2010
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    In the Man Cave
    Just getting into building some of these.
    Been using 110gr. V-Max and 110gr. Noslers.
    My first batches are with 18-19gr. of H-110 Powders in "Cut Down" .223/5.56 cases.

    Really not into suppressed at this time..

    Can you INGO'S give me some advise?? (Good advise that is..HA. HA..)
    THANKS in advance..Bill.
     

    Backpacker

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    Apr 5, 2008
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    I have been loading 150 grain hornady boat tail bullets with 15 grains of H110. I shoot a 9.5 inch barrel. Works well for me. Some of my brass is converted and some factory.
     

    freekforge

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    marion
    I use the same as backpacker 150gr fmjbt on top of 15gr of h110 and a cci small rifle primer. using mainly S&B factory brass and a few converted pieces. Im using a cheap radical upper and am getting 1.5"ish groups at 100yds. which i think is good considering i have ridiculous astigmatism and am using an eotech.

    14gr was pretty wimpy and anything over 15.5 put too much gas in my face and opened up the group.
     

    Bfish

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    Feb 24, 2013
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    subbed in to see other's loads. I am only doing subs and 125's. I'm using lil gun and LC brass.
     

    BiscuitsandGravy

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    110g polys, 125 OTFB (mostly), 147gr, 220 solids. Initially used Lil-Gun, not so much anymore. Switched to Hodgden CFE Black then now using Shooters World Blackout. There's not much data on SW-BO so you have to start low and work up. Mostly LC brass.

    :ingo:
     

    BiscuitsandGravy

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    Out of a 16" bbl... Todays accurate load was 18.8gr of SW-BO under a 123gr Nosler poly tip-FB, 2.100 coal, S&B-SR primer. 1" groups. Will easily hit a 1" 'piano key' dinger. Hot- about 85deg. No chrono info yet.
     

    jeffsqartan

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    Started loading 150gr Flat Nose from Xteme bullets. 14.1gr of Win 296 with a CCI 450 magnum primer. Not sure on accuracy yet. Fired 10 rounds to make sure it functioned and cycled properly.
    My Radical Firearms 16" upper seemed to like them just fine, but my Hardened Arms 8.5" upper was jamming when pulling a round from the right side of the mag. Didn't investigate too far as to why.
     

    bwframe

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    I got in 20 pretty quick shots with my 8 1/2" pistol Friday. Rough initial sighting in had me hitting a bowling pin steel target at 110 yards every time. Drop was pretty substantial at the next steel target. 12"+ drop at 165 yards.

    A lot more detailed work to do, but my initial load is 20gr CFE BLK under a 137gr cast/coated RN boolit.
     

    bwframe

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    I'm curious whether anyone has had any luck feeding flat nosed bullets. I have some cast/coated 168gr laying around. Wondering whether to further complicate my 300 ACC loading or save these for the .308 guns?

    Kinda related thread jack - Any of you regular 300 ACC shooters use the dedicated Magpul 300 Blackout mags? Are they needed?
     

    BiscuitsandGravy

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    I'm curious whether anyone has had any luck feeding flat nosed bullets. I have some cast/coated 168gr laying around. Wondering whether to further complicate my 300 ACC loading or save these for the .308 guns?

    Kinda related thread jack - Any of you regular 300 ACC shooters use the dedicated Magpul 300 Blackout mags? Are they needed?

    I've toyed with some old 100gr Speer lead round nosed. Didn't load too many. More of a lets try these. We switched to Lancer 20's so no help there.
     

    jeffsqartan

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    I'm curious whether anyone has had any luck feeding flat nosed bullets. I have some cast/coated 168gr laying around. Wondering whether to further complicate my 300 ACC loading or save these for the .308 guns?

    Kinda related thread jack - Any of you regular 300 ACC shooters use the dedicated Magpul 300 Blackout mags? Are they needed?

    I just started using 150gr FN bullets from Xtreme Bullets. They're supposed to be for 30/30, but they have been feeding into my Radical Firearms upper just fine. Granted, that's only 15 rounds so far, so take that with a grain of salt. Link - https://www.xtremebullets.com/308-150-FP-p/xc308-150fp-b0500.htm
    I messed with the Hardened arms 8.5" upper last night and I think the loading issue I experienced the other day was from my PMAG getting slightly cocked rearward. I tried some old GI 30rd metal mags and had 0 feeding issues. But with the PMAGs I was having the right side round occasionally slam into the bottom of the feed ramp. To clarify, I don't think it's a mag issue, because that same mag feeds my RF upper with 0 issues. I think it's the upper/lower fitment on my pistol. My pistol build is a little more loose than my rifle build.
    For the record,
    Rifle - Radical Firearms 16" 300blk upper, Rock River Arms .223 rifle lower and BCG
    Pistol - Hardened Arms 8.5" 300blk upper and BCG, Anderson Manufacturing lower

    PS- can't figure out why the picture won't format properly. Sorry for the sideways pic lol
     

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    freekforge

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    marion
    I picked up some 220gr eld-x bullets that i have been playing with im at 10.5gr of h110 right now. I think i might go up a bit to get more reliable bolt lock.
     

    bwframe

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    I just started using 150gr FN bullets from Xtreme Bullets. They're supposed to be for 30/30, but they have been feeding into my Radical Firearms upper just fine. Granted, that's only 15 rounds so far, so take that with a grain of salt. Link - https://www.xtremebullets.com/308-150-FP-p/xc308-150fp-b0500.htm
    I messed with the Hardened arms 8.5" upper last night and I think the loading issue I experienced the other day was from my PMAG getting slightly cocked rearward. I tried some old GI 30rd metal mags and had 0 feeding issues. But with the PMAGs I was having the right side round occasionally slam into the bottom of the feed ramp. To clarify, I don't think it's a mag issue, because that same mag feeds my RF upper with 0 issues. I think it's the upper/lower fitment on my pistol. My pistol build is a little more loose than my rifle build.
    For the record,
    Rifle - Radical Firearms 16" 300blk upper, Rock River Arms .223 rifle lower and BCG
    Pistol - Hardened Arms 8.5" 300blk upper and BCG, Anderson Manufacturing lower...

    Thanks for the info!

    I wonder what deer hunters are loading for deer and varmints? Success stories?

    Similarly, I wonder what successful loads folks have had a longer ranges with the 300 ACC?
     

    BiscuitsandGravy

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    Thanks for the info!

    I wonder what deer hunters are loading for deer and varmints? Success stories?

    Similarly, I wonder what successful loads folks have had a longer ranges with the 300 ACC?

    We use Barnes TacTX 110gr solid copper black tips for deer. Very accurate. My Son got his 1st 8 pt with 1 shot DRT. The TacTX are pricey though.

    Ground hogs and other varmints, Speer 130gr JHP Varminters. YMMV.
     

    jeffsqartan

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    Thanks for the info!

    I wonder what deer hunters are loading for deer and varmints? Success stories?

    Similarly, I wonder what successful loads folks have had a longer ranges with the 300 ACC?

    A couple years ago I used some 110gr Hollow Point Ozark Ordnance for deer. Dropped a button buck like a sack of potatoes at about 30yds.
    This last year I switched to hand loaded 110gr Hornady V-Max. Unfortunately, the one shot I took I missed. Still not sure if I blame it on the scope or my nerves... Anyway, I plan on using those same bullets for prairie dog hunting as well as deer later this year. I've heard it should do the trick just fine.
     

    bwframe

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    Good the hear the lighter bullets are effective for varmints and deer. I have been accumulating a variety of lighter 30 cal bullets as they come on sale.

    I have a few hundred 130gr Speer varmint HP's and similarly 110gr Hornady Z-Max's that need loads developed for.
     

    bwframe

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    Update: my new approach to 300 BLK Zero

    blktrajectory.png


    ...Although I enjoy shooting subsonic rounds out of my BLK it’s cheaper and more enjoyable to fire supersonics when you’re at a range and your buddy is firing his 5.56. So for a supersonic zero I have changed to a 25/150 yard – as illustrated by the red line above. This leaves me dead on at 25 yds, about 2″ high at both 50 and 100 yds, back on zero at 150 yds and 5″ low at 200 yds. That’s not too much to remember and even without doping shots hits will deviate by about 2″ or less at any range from 0-250 yds...


    Thoughts?
     

    Bfish

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    I like seeing where the 125's and 208's cross. That would seem to be the distance that I need to zero. The big question I didn't see from glancing things over is what barrel length this is with. I'm sure there is a large difference between an 8" and 16" barrel.
     
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