You need to know the drops for range whatever speed combined with bc that you end up shooting. I've ended up with mid range loads that are accurate and dependable, so I just go with it.
I ran after speed, feeding a 257 Roberts H100V under a 115 bt. After shooting almost a full pound of that powder along side the load I normally use, 43.5 RL19/115BT, I found the RL19 to be so much more consistent, that I stuck with the original slower load.
Even my 25-20 eats mid range mild loads.
