80 grains of AA-2230 is my favorite for a COL around 3.4" with 400-gr bullets, whether GSC HV or Woodleigh PPSN. Normal practices: Start at 72.0 gr, work up to 80.0 grains for SAAMI standard loads with 400-grainer. AA-2460 will also do about same at same charges. H322 at slightly lower charges. H4895 at higher charge weights with compression.
All those powders are temperature insensitive and good choices for 400-grainers, AA-2230 is top pick for me.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.
