I usual load of 44 gr IMR-4198 with the Hornady 350 FN gives me 1800 fps so I tried 46 Gr of the same powder with the same bullet and only got 1835 fps. My question is that "Is my 44 gr load something that I should consider max.?" The 44 gr load shots into 1 - 1 1/2" when the 46 gr load would shot into 1 1/2" - 2" for the test batch. According to the sixth edition of the Hornady manual 45.7 should be considered max out of there test rifle. This is the only powder that I've loaded in my 45/70 guide gun but I may try H 4198 in the future. This load shots very clean and that is something that I like about IMR 4198.