Greetings again @dannyb,
After my post I did what I should have done earlier and went back over earlier data. It appears that Hodgdon/ ADI have dropped their max load of AR2209 with the 150 grain projectile from 48.5 grains to 45.5 grains likely in responce to the increased powder speed. I also spotted that you are using Federal cases. These weigh around 179 grains compared with 164 grains to 169 grains for just about everything else. This results in reduced case capacity together with increased pressure and velocity. The extra 10 to 15 grains of case weight works out to about 1.1 to 1.7 less grains of case capacity. I loaded some rounds in different capacity .308W cases a while back to get a better idea of velocity impact but have yet to shoot them. Go shoot some deer with those loads and the Federal cases might look a bit better.
Regards Grandpamac.
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