I did not know that the Forbes LH was chambered in the 280 AI must have been very few made.
My best load so far has been 60 gr RL 26, Peterson 280 AI brass, CCI 200 primer , 160 gr Nosler Accubond about 2930 fps. Peterson brass heavier than RP or Nosler brass. Have not been able to get
162 gr Horn A Max to group without fliers?

kk alaska

Alaska 7 months of winter then 5 months of tourists