Did some shooting this weekend, using 71gr of Hogdons Superformance powder, with 165gr gmx bullets. Pressure was high but not maxed out, I was getting 3/4moa out to 250yrds at 3320fps on average. Decent load but sd was almost 40fps. Gonna play with primers next weekend. Was using rem9-1/2m. Hopefully I can get a lil better. I was honestly impressed with the superformance powder. 3320fps with a 165 leadfree bullet out of a 24" barrel! Was looking all over for some MagPro but settled on superformance, im glad it worked out.