Re: 300wm 180gr nosler ballistic tip
I have used H4350 and RL22 with this bullet.
Accuracy (.3") with my rifle and this bullet was found at 69.0gn of H4350 (3094fps) but I took it up to 71.0g (.7" and 3154fps) but settled on the milder load at the time. I was using the 9.5M primer.
With RL22, I settled on 75.5gn (book max) and used the BR2. Accuracy ran .752" for a five shot groups with an average velocity of 3093fps. During the warmer months, accuracy ran a little tighter and velocity was about 20-25fps faster but this testing was done in Novenber (northen VA).
I also tried the 190gn SMK with RL25 and H1000. RL25 didn't show anything promising in my rifle but H1000 with the CCI250 was excellent. The tightest group I ever shot in this rifle (.142") came at 79.0gn, velocity averaged 3078fps. It was hot that day, 94deg with heat index of 110deg, but I took it to 80.5gn in 1/2 gn increments and accuracy stayed under .522".
Another good bullet/powder combo was the 178gn A-Max with IMR4831 and the CCI250. I only tried 72.5 and 73.0gn and settled on 72.5. Velocity was .2995" and velocity averaged 3168fps. 73.0gn was .5375" and 3238fps.
Hope this helps. JohnnyK.