Sorry, SuperPerformance is not the old Light/Heavy magnum. Hornady was having Hobb's old time loading the L/H magnums, as they were heavily compressed loads, which, in a mass production scheme of things, made quality control very difficult. Everything has tolerances, and if the case neck was just a tad too thin, the bullets slipped, resulting in, at the very least, inconsistent OAL, and in the worst case, spills on the production line - very bad form with automated equipment banging out thousands of rounds an hour!
SuperPerformance depends on proprietary blended powders controlled to give a specific pressure curve, each nominal cartridge having its own powder, for each bullet weight.
I have yet to spring for a few boxes of the new stuff, but the now-discontinued L/H Magnums shot beautifully through my .308 and my '06. Still have some left, but I'll ante up for the SP stuff when the L/H magnums are all gone.
SuperPerformance depends on proprietary blended powders controlled to give a specific pressure curve, each nominal cartridge having its own powder, for each bullet weight.
I have yet to spring for a few boxes of the new stuff, but the now-discontinued L/H Magnums shot beautifully through my .308 and my '06. Still have some left, but I'll ante up for the SP stuff when the L/H magnums are all gone.



















































