Question about 300 aac blackout

[rcschummers]

Same projectiles as a ".308"? I understand they are the same weight and diameter. Sorry for thr stupid question, a simple yes or no will suffice. Thanks!

[autoduel]

^^^^
Are these Whisper loads? The max pressures listed don't come near 55,000 cup.
If the chamber is identical and the blackout handles high pressures, would pressure signs that show up on whisper loads also show up in blackout loads that may be safe for a blackout chamber? Has anyone measured chamber pressures with corresponding pressure signs?

For some reason there's no data for 168 gr bullets which I have a few hundred of.
Seems like it's <135gr or 220gr subsonics.

[StraightShooter]

I've done quite a bit of development for the blackout and bullets with a flat base shoot far better than boat tail bullets. The Sierra 2121's are increadibly accurate.

[rcschummers]

Thanks guys!