7mm Valkyrie AR specifications:
Cartridge overall length 2.295 inches 2.35 oal if windowed mag is used.
Case trim to length 1.596-1.6 inches
Max bullet length at 2.295 oal 1.3 inches
Max bullet length at 2.335 Oal 1.35 inches
will run most 7mm bullets up to 168 berger classic hunter others would need to be checked in chamber.
Form new brass to 1.305 at the shoulder with the hornady 375 adapter then measure fired cases and set back .003-.005 when resizing brass.
Best powder for speed in 20+ barrels Leverevolution
other powders that work well:
CFE223, Imr 8208, H335, TAC, H4895, Imr 4895 and many more in this burn range.