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1. #SUBSONIC 300 BLACKOUT SPEED HOW TO#
2. #SUBSONIC 300 BLACKOUT SPEED FULL#
3. #SUBSONIC 300 BLACKOUT SPEED SOFTWARE#
4. #SUBSONIC 300 BLACKOUT SPEED CODE#

One of the groups came in at exactly 0.900″: The AR Diamond trigger helps a LOT with concentration when shooting groups for accuracy like this! Groups averaged about 1″ at this distance which is plenty good for the kind of work I’ll be doing with these loads. I didn’t have a bipod mount on my upper, so I shot off some sand bags at maximum magnification: 6 power. Accuracy Testingįor accuracy testing, I decided to shoot some 5-shot groups at 50 yards, the maximum distance I’ll plan to shoot at for this ammunition scenario. That should bring the velocity to about 1040-1050 fps, which would be perfect. These are some great results! I’m thinking I’ll try 9.5 grains of H-110 as a compromise between energy retention and “supersonic buffer”. I chronographed two loads (see load data above), one with a 9.0 grain H-110 powder charge, and one with a 10.0 grain H-110 powder charge. The loaded ammunition looked as good as it shot:įor the chronograph data, I used the Caldwell G2 optical chronograph and the Caldwell companion app on my iPhone (see the f ull review I did on this system HERE).

#SUBSONIC 300 BLACKOUT SPEED HOW TO#

I’ll do some experimenting to figure out how to best solve that problem! This caused some issues with cartridges tipping forward or back of the press (no going into the completed cartridge bin). As mentioned in the video, the only real challenge loading with this setup is the strange balance (center of gravity) for these “top heavy” cartridges.

This ammunition was loaded on the Hornady Lock-N-Load AP 5-station progressive reloading press:Ī nice addition here would be a powder check die like Hornady’s Powder Cop, or the RCBS Lock-Out die.

#SUBSONIC 300 BLACKOUT SPEED CODE#

Always cross-reference load data with manufacturer’s published data.Īs mentioned in the video, if you’re looking for once-fired 300 Blackout brass, you can find it at Capital Cartridge (use “ULTIMATE” code to save 10%!). Ultimate Reloader is not responsible for errors in load data on this website. 9.0, 10.0 grains Hodgdon H-110 powder (See chronograph data below).Tested LoadsĪfter some testing and trials, I settled on the following components for my subsonic 300 Blackout loads for this article: This rifle performed flawlessly, absolutely love the AR Diamond trigger! I will however be looking for a better magazine setup for 300 Blackout scenarios (metal mag used would bind cartridges when loading). TriggerTech AR Diamond 1.5lb Trigger (see my review HERE).CMMG RipStock with 6 Position Enhanced Receiver Extension.

#SUBSONIC 300 BLACKOUT SPEED FULL#

Methodical load development by Discreet Ballistics has created a system which will minimize point of impact shift allowing the shooter greater confidence when it’s time to hunt.Berry’s 300 Blackout 220 grain bullets fill an important niche in the “heavy 30 caliber” bullet market, offering optimum weight and performance for 300 Blackout without breaking the bank.įor the testing performed as a part of putting this article together, I used the following AR-15 rifle configuration:Īnderson Manufacturing AR-15 300 Blackout Upper:ĬMMG Resolute AR-15 Lower: ( full rifles HERE, my CMMG 350 Legend story HERE) The Discreet Ballistics’ two load system was conceived so that the shooter of subsonic ammunition can practice with a less costly Target load, and hunt with a premium load utilizing the Selous Machined Expander. Hunting Loads utilize the Selous Machined Expander 188gr solid copper projectile which expands to over three times its original diameter upon entering fluidĮffective range is usually within 75-100 yards due to dramatic bullet drop past 100yds – Muzzle velocity is typically between 900-1050fps depending on the barrel. Industry leading seating depth consistency. Powder charges consistent to within 0.1 grain Utilizes brand new Discreet Ballistics headstamp brass

#SUBSONIC 300 BLACKOUT SPEED SOFTWARE#

This projectile was designed using state-of-the-art ballistics modeling software to maximize stability at subsonic velocities. The Discreet Ballistics 300 AAC Blackout 188gr Selous Machined Expander is a subsonic hunting load that incorporates a machined copper 30 Cal projectile (the Selous bullet) which expands at subsonic velocities above 750 feet per second.