Spent some time at the range today fine-tuning a .308 handload. Settled on 42 gr

Spent some time at the range today fine-tuning a .308 handload. Settled on 42 grains of IMR 4064 for my M1A. Perfect combo for tack-driving accuracy out to 600 yards. It's easy to overlook the little details like consistent powder weight, but precision always rewards patience. Anyone else found a sweet spot reload for their M1A or another rifle that's stood the test of time?