I would love to use h4350 but its imposible to get right nowI have a 243 Winchester and shoot 87gr and 95gr bullets in it. It’s very similar to the 6mm Creedmoor performance wise. I would look at H4350, IMR 4451, and RL16. I use IMR 4451 in my .243 and my loads are 3320fps with the 87gr VMAX and 3220fps with the Berger 95gr. Everyone likes to shoot Varget or something similar but you won’t get the performance from a powder that fast like you will with the 4350 burn rate powders.