I have gotten the best accuracy with H-335, W-748, X-Terminator and H-322 with 40 gr bullets - but have not tried Benchmark, 10x and a bunch of other powders that are applicable. Since I load a lot of .223 ammo at a time, I like the way spherical powders or short-grain powders flow through a measure uniformly.

�That rifle on the wall of the labourer's cottage or working class flat is the symbol of democracy. It is our job to see that it stays there.� George Orwell