Wind Gypsy
5 year old buck +
Don't know what other calibers Natty has, but I'd look at those too before I picked a powder specifically for the .257. 4831 is a good powder and I'd probably look at the 4831SC if I was using a powder measure.
Yeah, i've used H4831 successfully in a few cartridges. Consistent, stable, accurate. That N555 is a newer one that is a similar burn rate to 4831, maybe a hair faster, but gets better velocity, is temp stable, and is actually cheaper now with the wild hodgdon price hikes. (dont tell anyone though..). Wish I didn’t like it as much because I have 30 some pounds of h4350 that is now less appealing