Not that I have found yet. In powder burn rate charts, Superformance rates just slower than H4831. So I started with a moderate load for H4831 from the Nosler #6 manual and worked up in 1/2gr. increments, watching closely for preasure signs. My 270 really likes this powder with both the Barnes 130 TTSX and Sierra 130 SPBT.
If you use the Barnes bullets remember they prefer to be seated further off the lands than other bullets. Barnes recommends .050 off. I have found that this does seem to be the sweet spot for these bullets.
