If you're going light, like the 95 to 107 gr bullets, you should be going to a faster powder. I used IMR 8208 XBR VERY successfully with the 100 gr Partition. Fast, accurate, and low ES/SD's.
Alan
I agree with this. My .260 didn't perform like it should with reloading manual 100 grain powders (Varget, RL-15, Big Game, etc.). Once I lit it with H4895, Benchmark, etc. it started to perk. 8208 would be a good one too I bet.
There is only one way to determine what your rifle likes or doesn't like -
