I loaded up both RMC and Magtec brass using Pyrodex, Black Magic, 777, Shockeys Gold and found I prefer the 777 as I was trying to get to 1200-1250FPS. I could not get the magtech brass using 11 ga wads to pattern at all. I was using a 3 dram equivalent loading with ~1 1/8 oz. The RMC brass with regular wads did quite well with any of the powders. I found the info at the below site helpful and bought the Ballistic Products book also http://www.tbullock.com/bpsg.html. At this point most of the time I am roll crimping paper shells and using the Ballistic Product short 12 gauge wads loading about 1.1oz lead over 80 grains by volume of 777. I need to run my loaded RMCs through my Flues and then resize to shoot in my Burgess. RMC has new owners. Their turn around time is faster but the quality in my experience is inferior to what Dave produced.