Originally Posted by hypersonic
Mine likes H-4831 the best but 4350 is also a good choice as are RL-22 and RL-19 also don't over look 7828 with a pipe that long. Superformance is next on my hit list for testing if my life ever slows down. Should squeeze a bit more speed than 4831 and if the other cartridges I have worked this powder into are any indication I should be able to get better accuracy too. I like the superformance even though there is no data for what I like to use it in it works really well. I start with 4831 starting loads and work up slowly. I can always find superformance but other powders are still hard to come by
What kind of velocities are you getting with H4831? I tried it in my 260 with a 28" barrel some time ago and although accuracy was outstanding, the velocity was waaay too low. H4350 took care of the velocity 'problem' and produced fantastic accuracy.