If you need more velocity Alliant Reloder 7 will deliver but the accuracy in my rifles is noticeably not as good as that delivered by Alliant Reloder 10x. 43.0 grains of of Alliant Reloder 10x is just about a maximum load with the Hornady bullet delivering 2,330 fps in my rifles, but it is good from 80 degrees to 32 degrees and, we may see both temperatures in the same week during deer season.
I got the opposite result in my .358 Win, which is pretty close to the .356 Win.
RL-7 was more accurate than RL-10, especially with lighter bullets.
I've read that some, like you, prefer RL-10.
X-Terminator is probably my fav all around .358 Win powder, including heavier bullets up to 225 gr. I don't use 250's, thinking they're more suited to the 35 Whelen and larger capacity cases. 250's are sorta slow in the .358 Win, although I know some like them.
DF
