Thread: Factory loads exceeding reload speeds with less pressure signs

Greetings @Stephanhope,
Primer appearance is practically worthless for guessing pressure. @gimp is onto it asking about your shoulder bump as too much headspace will show flat primers at low pressure. 43 grains of AR2208 with the 150 grain in the .308 is piss weak and below start loads. 47 grains is book max which would give you roughly an additional 200 fps or you guessed it 2,600 fps. The problem is that you being misled by the primer. You are clearly sizing your cases too much and setting the shoulder back. This will give you head separations in time. There is nothing wrong with the powder you just aren't using enough.
Regards Grandpamac.