IMR 4064 has worked well for me with the 50s.
I've been meaning to try some R-15, it gets good reviews too.
I've been meaning to try some R-15, it gets good reviews too.
Varget has been the best for me so far. I've used H-380 but found it to be a bit too temp sensitive./QUOTE]
Using the Hornady manual, I found an amazingly accurate load of 35.5 gr H380 and 55 Vmax moly. Used it for years, but never could reach out there like expected and was experiencing blackened necks. Got a chrony and hooked up with GGVG and found I was shooting a 223...well not really but was only running them at 3250 fps! My Hornady manual load was only a grain below max in that book, but newer manuals show max with H380 up to 41 grains!!!
The H380 load was accurate, but I'd experience 3" verticle POI shift in cold weather. I tried working up to a stiff load of H380 and never did get the accuracy I wanted. I switched to a healthy dose of Varget and my accuracy was nearly the same with the 55 vmax moly and velocities up "where they should be" at around 3600 fps.
Charlie
...I've got some of that setting in the powder locker also.Larry
Take a look a the Hodgdon site and Benchmark. You will hard pressed to get much more than 3900 fps with your 22-250 but Benchmark will do it with ease and cleanly. My load is with 50 V-Max and very accurate. It is one of Hodgdon's extreme powder so no trouble shoting it on those real hot days on the PD fields.
http://www.hodgdon.com/data/rifle/22250rem.php