I just received an order of powder from Graf, and I decided to buy their proprietary brand as it is 3 bucks a pound cheaper than Goex which has been the powder I've used for a number of years. 5# of FF and 5# of FFF. I went out to the range yesterday with the .54 GPR, and I was quite pleased with the powder. Both grains shot noticeably cleaner than the Goex, and *felt* a bit hotter than Goex to boot. Normally, I'd wipe maybe every 3-4 shots with Goex FF, and get 6-7 shots between wipes with FFF. With both grains of Graf powder I got a good 10 shots before loading got a bit stiff, and the fouling that was present seems softer as well. I like the stuff, and will be using it as long as it is available. I used my usual ball/patch/lube combo, but I do think I'll have to spend a little time reworking the loads for it, as my *pet* Goex loads...85 gr. FFF and 105gr FF opened my groups up when shooting the Graf powder. I don't have a chrono, so my impressions are subjective, but it did feel like the loads were hotter than my old ones.