Should I build a 5.56 or 300 Blackout?
If you plan on hunting medium or large game — such as deer, hogs, or smaller bears — the . 300 BLK is far superior. The extra mass gives more reliable penetration than the 5.56.
Does 300 Blackout penetrate more than 556?
The round can cover more yards and keep velocity better than its heavier counterpart. In testing fired from a 16″ barrel, it was shown that 300 blackout had nearly double the ft-lbs on the impact that a 5.56 round had 200 yards and 300 yards. The bullet drop becomes much more substantial at range with the .
Can I use 300 Blackout in a 5.56 lower?
Standard 5.56 magazines will work with the 300 Blackout without issue, or even a loss of a round or two. The simple fact is, nearly every standard AR 15 part will work with 300 Blackout and that is the reason building 300 blackout is growing in popularity.
Can you load 300 Blackout in a 5.56 mag?
300BLK cartridge will chamber in a 5.56 rifle, but in no way, shape or form should you ever try to fire it. The . 22-caliber bore simply isn’t big enough to handle the .
What grain bullet does military use for 300 Blackout?
. 300 AAC Blackout
| Bullet mass/type | Velocity | Energy |
|---|---|---|
| 220 gr (14 g) OTM | 1,010 ft/s (310 m/s) | 498 ft⋅lbf (675 J) |
| 78 gr (5 g) Lehigh Defense CQ | 2,800 ft/s (850 m/s) | 1,358 ft⋅lbf (1,841 J) |
| 90 gr (6 g) Barnes OTFB | 2,550 ft/s (780 m/s) | 1,300 ft⋅lbf (1,800 J) |
| 110 gr (7 g) Hornady Black V-MAX | 2,375 ft/s (724 m/s) | 1,377 ft⋅lbf (1,867 J) |
Do Pmags work with 300 Blackout?
The Magpul PMAG 30 AR 300 Blackout GEN M3 Magazine is purpose-built for rifles chambered in 300 Blackout. While 300 BLK is compatible with 5.56x45mm parts, having a dedicated 300 Blackout PMAG significantly improves overall reliability.
What magazine do I need for 300 Blackout?
300 AAC is technically compatible with 5.56 magazines. You can run the . 300 Blackout through 5.56 magazines without issues. However, it’s always a good idea to use magazines specifically made for the caliber you’re loading on your rifle.