Love benchmark... 24.8 grains over hornady 55gr sp's is a great load for my AR... That's at the top of the scale, so don't start there! It also meters well, and is supposed to be less sensitive to temp changes... You should be pretty happy with it.
BTW -- this is by no means authoritative, but this is the list I've collected of 308 case capacities over the years -- mostly from others measurements.
I would measure myself before I took it literally, but may help others as a guide...
Notice how LC brass is down in the 52 grain capacity...
52 grains of capacity is common to military brass, I load LC brass, and have to reduce my powder charge accordingly.
I haven't weighed Remington brass personally, but the Winchester I've weighed usually runs around 56 to 58 grains of capacity, and my understanding is the most civilian 308...
A buddy of mine has Quickload, and just ran this for me. This is the Nosler 168gr bthp, IMR 4895@44gr
Case volume was set to 56 grains of H2O. Basically shows about just what you're seeing at the range.
Pressure: 50880 psi
Velocity: 2575 fps
Have your buddy check the values he plugged in --...
If you need large rifle primers, was at Grafs today, and was told they're expecting a large shipment of Winchester wlr this week... I think they're still about $35/k
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