wow.....my favorite is the one that works best in the cartridge at the time.
but....there is a list i've used n had success with above others n have in stock to use in what i load.... H1000, AA2015, H322, Benchmark, IMR4198, IMR4350, H110, 2400, Varget, H4895, Blue Dot, H335, and SR4759. i would only add others if these did not produce results, n so far that has not been the case.