Re: WARNING- SuperPerformance Powder
It works fine with published data, but it's more like h450/h4831 and it will not produce good velocity in a 35 whelen. rl15 or 4064 are the powders of choice there. My 35 whelen is eating 220 speers and rl15. I'm using superformance in my 25wssm and it'll do over 3300 fps with a 100grain at 1 moa. It's(SP) nearly 200 fps over the next powder I use.