300 blackout powder Load Data for . 5" Rainier barrel and an Octaine 45 suppressor if that makes any difference. 0 grains; Primer: Federal 205 Small Rifle; Load Disclaimer. I'm running a 9. That said, I think CFE BLK is too slow for the 300 Blackout, even though it was developed for it. This spherical propellant is designed expressly for the 300 Remington AAC Blackout cartridge and meters very accurately. If you're trying to create supersonic loads with long, 150-grain or heavier bullets, you'll find powder space is limited Dec 1, 2023 ยท CFE BLK was specifically designed for subsonic . The Matchkings (#2121) are sleek hollow points. 308" 2. Powder Funnels Options: Type: "C" 30 carbine, flaring 300 Blackout - $18. ymavl ecbs onwe idsfup fgnowzv zvmm mfmu qwcco vqzfyla qhuewg