With the Barnes Tipped Triple Shock (200 grain) and 250 grain speer Hot-Cors, the MR-2000 was wayyyyy too slow of a powder. With both of these bullets almost the same length, I topped out at 49.5 grains of powder for the 200 grain Barnes, and 50.5 grains with the 250 grain Speer.
Didn't see anything above 2,200 fps from either bullet. Lesson learned: MR-2000 will surely hot-rod the 308 Winchester with heavy bullets, but yah need to get bolder with the 358 Win and go with something substantially faster (burn rate).
With the new Reloader 10x powder having a slower burn rate than Reloader 7, I'll give this powder a try next.