150 grain bullet with 55 grains of IMR 4230
180 grainer 50.5 grains of IMR 4064
220...56 grains of IMR 4831
Per Jack O'Connors loads from his book "The Hunting Rifle".
Don't you mean 4320 instead of 4230?
Also, IMR-4831 was not available in 1965, when O'Connor's book was published, so I'm pretty sure he was using 56 grains of H 4831 with the 220 grain bullet.
