These cases are Widener's primed never fired Lake City Brass. Bullets were lightly crimped with LEE Factory Crimp.
These were shot out of an Aero M5 with 16" Rainer Barrel. Aero Bolt Carrier with JP Enhanced .308 bolt
It was about 95 degrees and the cartridges were around the same temp. I was shooting, putting rifle down, writing down the chrono reading, then shooting again.
During the time between shots the round in the chamber was probably getting a lot hotter than 95 degrees.
Left to right:
First two rows are 45.0gr Ramshot TAC behind 150gr BTFMJ - 10 shot avg 2741 fps
Next two rows are 45.3gr Ramshot TAC behind 150gr BTFMJ - 10 shot avg 2754 fps
Next two rows are 45.5gr Ramshot TAC behind 150gr BTFMJ - 10 shot avg 2759 fps
then you have an empty row followed by:
One row 45.3 Ramshot TAC behind 147gr BTFMJ
Next two rows are 45gr Ramshot TAC behind 147gr BTFMJ
I don't think ejector swipes are overpressure signs. I get those on Federal M80 white box.
Not problems with ejection or sticking cases even with 45.5gr load
Ramshot lists TAC min/max 42.4-47.1 for 150g BT-FMJ.
If I subtract 1gr for LC brass I get 46.1 and I'm under that.
I think I'm OK here but I'm open to second opinions.