I don't plan on using the IMR4350 for my 6.5 Creedmoor reloads simply because my rifle doesn't shoot it well. My groups are almost double what they are with Superformance with 140 and 143 gr bullets. It was the first powder that I tried because the reload data is nearly identical to that of H4350, which seems to be the most popular (and impossible to find near me). All of my other rifles shoot IMR powders very well, but not this one.
Good enough. It's really amazing sometimes the affect powder has to both accuracyy and velocity