I use 43.0 gr. of H4350 in fully prepped Win brass. This is all lit by a Fed 210 M. This load is sub moa in my rifle out to 1K. 44.5 gr. gave the exact same accuracy, I opted for the lighter slower load to save wear and tear on equipment. The 43 gr. load gives me 3200 fps, while the 44.5 should be around 3275 ish.