Texas10 wrote on Nov 20^th, 2019 at 5:53pm:

Got around to prepping the first bag of Winchester Brass I picked up a week or so ago, and lost 5 of 50 to neck defects. Splits, folded over brass at the mouth, I assume was due to the neck trim dies being worn.  I'm loading for a sporterized Krag, 22 inch barrel. Would a faster powder than IMR 4350 be preferred for 220 gr RN Hornaday's? I have H4350, RL 15, RL16, RL17, H380,Varget, 3031, 4320, to name a few.

Load data is going to be hard to come by for many of the powders you're listed. I did find a listing on Steve'spages.com.  His info is a compilation of anything he could find, with no velocity or pressure mentioned.  He gave a wide range of from 31.5-42gr of H380.  The H380 would probably work better with a magnum or CCI#34 primer.  It's not much faster than H4350, and supposedly about the same burn rate as RL15.  Varget and 4064 are about the same burn rate in relation to each other, faster than either RL15 or H380, and I see a range of 29.3-40gr for 4064 on Steve'spages.