01-22-2016, 03:40 AM
CFE-223 and Ramshot TAC has been pretty good for me. I am shooting 120gr. Prvi HPBT, 120 gr. Hornady GMX, and 123 gr. Hornady AMAX propelled by CFE-223. As for temperature sensitivity, I have shot the following: 31.0 grs CFE-223, 120 Prvi HPBT, COAL at 2.255, 5 shots, 2507 FPS Avg. (20" Shilen, Win SR primers, Hornady Brass, Magnetospeed Chrony), temp at 78 degree F. However, at -2 degrees F, the same load comes in at a 5 shot avg of 2402 FPS. So there is some temp difference. Interestingly, using 29.2 grains of Ramshot TAC with a 107 SMK, same brass, primer mfg, and COAL at 75 degree F, 5 shot avg = 2649 FPS, at 35 deg. F = 2558 FPS, and at -2 deg F, a five shot avg = 2494 FPS. It would appear that not only is CFE-223 somewhat temp sensitive, so is Ramshot TAC.