I purchased dies in .357 Sig some time back. I loaded up about 1200 rds even though I did not have a gun in that caliber. I was planning to get a barrel for my S&W 40C (Sigma), but Smith stopped making them before I got around to it. With the aquisition of my Glock 20 and a Lone Wolf conversion barrel, I got the chance to try some out. My guestimated load worked great. 5 gr Red Dot pushing a 125 gr RNFP hard cast bullet shoots w/in 2" at 25 yards. Since I am shooting them through a 10 mm based gun, I thought perhaps I can expand my bullet choices. My RNFP mold is only a two cavity, but my 125 gr RN is a six cavity. At triple the output I think I will be using this mold from now on. I believe I will stick to the same load of Red Dot because I do not like to have a bunch of different powders laying around. RD may not be the best, but I cannot complain about the results.