300 BLK uses bullets with a higher ballistic coefficient but isn’t moving fast enough to take advantage of its sleeker projectiles. You can see above that the 5.56 is significantly flatter than the. 300 BLK, and the most popular civilian barrel length of 16-inches.Įxterior ballistics are the qualities associated with how a projectile flies through the air - wind drift, bullet drop, and zero range all fall into this category. It shows the barrels that the cartridges were designed around…20-inches for the 5.56, 9-inches for the. In the table above you can see the compared ballistics of both the. 300 BLK is a nice option.įor a duty rifle that will conduct CQB work, this cartridge is a godsend. 300 BLK also shows its strengths when short-barreled rifles and silencers are involved. It also has the ability to cycle both super and subsonic ammunition without modification.
#5.56 subsonic ammo full
30 caliber bore, burns its full potential in a 9-inch barrel, and is a much better choice for hunting. 300 BLK offers a wider range of projectile choices, thanks to the.
It also shoots flatter, experiences less recoil, and ammunition weighs about 40% less. The 5.56 is half the cost of 300 BLK and is available in more high-end loading suitable for precision rifle fire. 300 BLK and 5.56 NATO are intermediate-class rifle cartridges for target shooting, hunting, home defense, and plinking. The 5.56 requires a 20-inch barrel to reach peak ballistic performance.300 Blackout vs. 300 BLK also reaches peak ballistic potential from a 9-inch barrel.30 Cal and 5.56 Suppressors The 110-grain rounds are supersonic, and the 220 subsonic.Ī subsonic round is much easier to suppress, and much quieter when suppressed. 300 BLK does a lot the 5.56 can’t.įirst off, it’s a very versatile load with projectiles weights ranging from 110 grains to 220 grains. 300 BLK has easily been the most successful new caliber in the last 20 years.īesides the easy conversion between 5.56 and. The AR-15/.300 BLK combo does this markedly better than the 5.56 NATO. You need a hard-hitting, short, light, and quiet, gun that will own 0 to 300 yards. 300 BLK is really what two long protracted wars in the Middle East have taught us about the modern gunfight. What you have now is the ultimate short-range thumper that will feed both supersonic and subsonic ammunition and get its full ballistic potential (complete burn of the powder) from a 9-inch barrel. 223.It is then stuffed with fast-burning powders and any number of bullets weighing from 110 to 220-grain. 300BLK which was designed for heavier loads and subsonic loads and was happier than I was dorking around with subsonic. Sorry for the negative post, but at one point I had the same thought. 223 subs? Just for shits and giggles at the range or is there a specific niche you want to fill for hunting? Heavier bullets usually mean longer bullets and those may not stabilize in the twist rates you have. You can't go too heavy because eventually you'll exceed the pressure spec. The obvious path to subsonic loads is to go with heavier bullets since velocity has an upper limit.
If you go down the path of reloading, do your homework on bullets, twist rate, and find some good recipes before you invest in all the gear. Nothing is insurmountable and I accept that maybe I was doing something stupid as it was the first rifle caliber I ever loaded. AR cases get filthy, the cases are smaller, theres the f'cking crimps to scrape out, and theres not a lot of case capacity to work with. It helped during the ammo drought but at current prices its hard to justify. I found it to be an irritating pain in the ass honestly. I have not reloaded subsonics but I have reloaded.
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