I'd guess 4416 would work with both 250's and 286's, since it's in the same approximate burn-rate range as Varget and RL-15. 4451 might be about right for 286's, but Hodgdon doesn't have them listed on their data for the 9.3x62 yet.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
