I get 1/4 moa with H4350 and Winchester stabal 6.5
RL17 rare up here too. That stabal 6.5 is made foe the creedmoor.
Tried the 4350 and with my rifle doesn’t seem to like it as much as the RL 15. I have read several blogs on the RL 17 being a better performer for the target shooter from long range. I have at most a 385 yard shot from my box but I am insanely picky about the accuracy of my shots.