My bad, I was thinking of W296 and H110 and Varget and IMR4320 that are the pistol, rifle powder that are near twins. I have seen 2400 refered to on boards and in the manuals, it is quite popular. I never load anything without refering to the manual first and sticking to rifle powder for rifle (Varget) and pistol powder for pistol (H110, Titegroup). After I get a crono I'll be venturing out into others if need be. Varget has given my very good results in the 30/30, 223, 308 and as good as factory for the 35 rem. The 110 has been working stellar for my magnum pistols and the tite group very well in 40 and 38 spl.