I've been using H414, what's better.
I like powders that meter very smoothly.
Spot
Like others I've used a variety of powders, including H414, in the 243 but prefer H4350 because it's what's on the bench in greatest abundance and I'm not a big fan of ball powders... OTOH, if you're looking for good metering H414 won't be beat by H4350.
Ramshot Hunter would meter very well and be an excellent 243 powder, but I find the stuff TOO fine (which seems nearly impossible, but for me is the case).