Personally, I have had best accuracy and velocity with powders in the 4350 burn rate range, even slightly faster. Presently using Reloder 16 and Accurate 2700 with 165/168 gr bullets. I would think Superformance would work fine but you may be leaving some velocity on the table with 150 gr bullets. Neither Hodgdon or Nosler reference Superformance in their 300 SAUM data (or Nosler's 30-06 AI data).
