My 340 C .30-30 is superbly accurate but equally slow.Velocities with loads that gave 2300 fps in a 20 inch Marlin are 150 fps slower out of the 22 inch Savage. I've used H335 to get great velocities in the past, and it is the fastest powder I've tried in my 340, but I'd be alot more comfortable with alittle more oomph.Winchester 1250 grain Power Point Plus is the velocity champ at 2250 fps and Hornady Frontier 150's oozed out at 2015 fps! The fastest I've gotten a 150 to go so far is 2250 ( 36 gr H335).H322 gives similar velocities , but accuracy is poor by comparison. IMR 3031 is about 50 fps behind H335 and gives fine accuracy. I am really puzzled why a rifle that slugs .300 bore .308 groove and shows little wear and no erosion, should be bested by a Marlin 20 incher with 3500 rounds through it. Any powders out there that could give higher velocities? I shoot 130 Hornady single shot pistol bullets , but not with H335 yet ( ran out)and accuracy is unreal. I want to get some 170's for bear too. I'd like to get the 130's to 2500 the 150's to 2300 and 2200 with the 170's. Any help would be apperciated.I'm not trying to turn a 30-30 into a 300 Savage, but it seems to me I should get better from a longer barrel...