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Results 1 to 17 of 17

Thread: 300 Blackout Success

  1. #1
    Boolit Buddy
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    Jun 2018
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    300 Blackout Success

    I got my Lee312-160-2r mold in the mail today for my 300 Blackout. I cast up a handful of bullets, powder coated them, and loaded ten of them to make sure they were going to function.

    I loaded them with 16 grains of Lil Gun with an OAL of 2.018 inches. I have the cases trimmed to 1.355" and that puts the last lube groove even with the end of the case. I put a mild crimp on the cases to help prevent bullet setback.

    I didn't put them on paper, but I did confirm that they were able to at least hit an 8" steel plate at 50 yards. I was shooting offhand with a red dot.

    Ejection was strong and to the 4 o'clock direction, primers are not flat, and the cases were fire formed to the chamber. Cases were made from once fired 223/556 cases.

  2. #2
    AKA: GRMPS Conditor22's Avatar
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    I love it when a plan comes together. Now you have a starting point to narrow it down (tighten up the group on paper)

  3. #3
    Boolit Master

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    It sure feels good when thing work from the start.
    "Varium et mutabile semper femina." - Virgil
    Man, ain't it the truth....

  4. #4
    Boolit Buddy DAFzipper's Avatar
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    Mar 2008
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    I never got that boolit to work in 2 different barrels. Glad it worked out for you

    Sent from my LG-H700 using Tapatalk

  5. #5
    Boolit Buddy
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    The barrel is 10.5 inches, 8" twist, and a pistol length gas system.

  6. #6
    Boolit Master
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    300 Blackout Success

    That’s my main 300AAC boolit too. I have had good success with it in an MAS defense 16” barrel on a basic carbine. I get 100% function and fine accuracy if I do my part in both reloading and shooting.


    Sent from my iPhone using Tapatalk
    Last edited by Boolseye; 08-18-2019 at 04:44 PM.

  7. #7
    Boolit Master Drew P's Avatar
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    I had some trouble with the powder coating making the noses too big. That was before I switched to hitek however. It’s much thinner and more consistent.

  8. #8
    Boolit Buddy
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    Quote Originally Posted by Drew P View Post
    I had some trouble with the powder coating making the noses too big. That was before I switched to hitek however. It’s much thinner and more consistent.
    I've been thinking about switching to Hitek for my bullet coatings.

  9. #9
    Boolit Grand Master






    Lloyd Smale's Avatar
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    cure to all your bo problems and its on sale. https://www.midwayusa.com/product/1010267198?pid=305808
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  10. #10
    Boolit Buddy
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    Thats probably one of the most popular 300AAC bullets that many start with because it simply works and its the best plinking round for 300. Casting and reloading with those will cost less per round then .223 and its much more satisfying to shoot.

  11. #11
    Boolit Buddy
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    Click image for larger version. 

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    I backed the powder load off to 15 grains, OAL is still the same.

  12. #12
    Boolit Grand Master Texas by God's Avatar
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    I’m still waiting to see( or achieve) a good cast boolit group on paper from a .300 BO. I tried 6 different boolits in mine. No such problem with my 7.62x39 AR. They are both brilliant with jacketed bullets. The x39 shoots cast better @100 yds than the BO does @ 40yds. My rifles; yours may differ.

  13. #13
    Boolit Buddy
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    I'll get some more ammo loaded up in the next couple days and post some results on Saturday at 100 yards. I am using a 2 MOA red dot on my gun, so don't expect match grade accuracy.

  14. #14
    Boolit Grand Master






    Lloyd Smale's Avatar
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    my 16 inch gun does just under 2 inch at a 100 yards with the rcbs 130 and 16 grains of aa9 (wc820). or 19 grains of wc297. 8.5 inch gun will shoot 1.5 at 50 but has a red dot and I just don't do good with a red dot at a 100yards. But it defineately pounds the 6x6 in steel plates at a 100. Is it moa NOPE. But I never set out to have a target bullet. Its a cheap way to shoot hundreds of rounds at a crack. Something that before I got into 300 bos I could only do with 9mm ar15s. Its also minute of man if ever I needed it for a shtf senerio. But when it comes to actually killing game ill stick with jacketed bullets. The 300 is already marginal and im not going to hamstring it by trying to make a pointy hard bullet kill deer. Ill add to that those are the ONLY TWO loads ive tried with a that bullet. Id about bet if someone had the time and paitents and tried some different powders or even charge weights you probably could get moa out of it.
    Soldier of God, sixgun junky, Retired electrical lineman. My office was a 100 feet in the air, closer to God the better

  15. #15
    Boolit Buddy
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    I backed the powder charge off to 12 grains, with the same OAL. While the gun functioned fine I felt that it was just way too hot to be accurate.
    I shot some Hornady 300 blackout ammo the other day and it had a super super mild recoil and the gun ran just fine.
    I might try loading some ammo up with 11 grains and 11.5 grains to see if they function.

  16. #16
    Boolit Grand Master popper's Avatar
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    Tex - CB Loads / Military Rifles/new black out load - post #5. Haven't shot it in the 10" 8 pistol yet, just a holo sight. This is carbine 10:1, scoped. Upped the load and some with 296 for tomorrow, I hope. Slick sided PC vs BLL.
    Whatever!

  17. #17
    Boolit Buddy
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    Just went out and shot some more ammo loaded up with 12 grains of powder. Much more accurate, and bullets are stable at 100 yards.
    I'll have to put my gun on a rest to see what kind of accuracy I'm getting out of it. I managed to get a 6 inch group at 100 yards shooting from a kneeling position.
    That was much better than I had gotten with hotter loads. I'm happy with the accuracy I'm getting out of it now.

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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