If the Army is getting 2750 fps at 50,000 psi why is Remchester not getting about 3100 at 62,000 psi? (Rule of thumb confirmed by Vihtavuori, the increase in velocity is about half the increase in pressure.)
Answer: The Army still goes by crusher gauge readings but since they are not a member of SAAMI do not recognize the CUP terminology and report crusher data in psi. When the round(s) were introduced, the .308 Winchester was specified at a maximum of 55,000 psi (pre CUP crusher data) and a standard of 52,000. You will find 2000 psi difference in cartridges out of the same box, and 5000 difference from lot to lot.
I guess you could run into trouble if you reloaded minimum commercial cases shot in a maximum military chamber, which might become a problem when people realize that whining about the lack of cheap foreign ammunition is not going to help and start trying to handload for their parts guns.