Head to Head
300 Blackout vs 5.56 NATO
Suppressed, short-barrel subsonic flexibility vs. cheap, flat-shooting standard.
300 Blackout
Best for: Suppressed & short barrels
- Excellent from short barrels
- Runs subsonic + suppressed beautifully
- Uses standard AR-15 mags & bolt
- More energy up close
VS
5.56 NATO
Best for: Range, defense, value
- Much cheaper, everywhere
- Flatter shooting at distance
- Higher velocity
- Lighter recoil
The Verdict
Choose 300 BLK for a suppressed SBR/pistol that thrives subsonic. Choose 5.56 for affordability, distance, and general use. Note: never load 300 BLK in a 5.56 upper — it can be catastrophic.