Exact charge weights are sometimes not needed for excellent accuracy or precision. Best example is what military teams learned with their 30 caliber semiautomatic service rifles.
Best accuracy in M14NM and 7.62 converted M1 Garands with best lots of M118 ammo was about 2.3 MOA at 600 yards. Charge weights of IMR4895 had spreads of 3/10ths grain. The 173 grain FMJBT match bullets came from 3 or 4 different sets of dies.
Rebulleting that ammo with Sierra 180 grain HPMKs produced ammo that tested about .67 MOA at 600; powder charge weight spreads were not changed.
Best accuracy in M14NM and 7.62 converted M1 Garands with best lots of M118 ammo was about 2.3 MOA at 600 yards. Charge weights of IMR4895 had spreads of 3/10ths grain. The 173 grain FMJBT match bullets came from 3 or 4 different sets of dies.
Rebulleting that ammo with Sierra 180 grain HPMKs produced ammo that tested about .67 MOA at 600; powder charge weight spreads were not changed.