This loading is for a Sig Sauer 1911 Target 5" barrel. The barrel has been throated by Doug. I'm casting two bullets so far for this one. A Lee 452-200 SWC(H&G #68) and the 200 RF bullet. I load the #68 at 1.250 OAL and the RF at 1.20. I can plunk the RF at longer lengths, but it won't fit in the factory magazines much longer than 1.20. The RF bullet is .110 shorter than the the SWC so even with the shorter OAL it's sticking down into the case .06 less than the SWC, giving more case capacity with the RF. I've shot over a thousand rounds of each bullet in this pistol with no more than 2 failures to return to battery due to catching on the case mouth. I don't really crimp, just reduce the case bell to .472.
My question is on powder charge and velocity. Due to the short bullet intruding less into the case, I'm getting way less velocity than published loads. I realize the published loads are for the #68 bullet. Hodgdon lists Universal with starting load at 5.8 gr for 889fps, and a max of 6.3 for 962 at 1.225 OAL. I'm getting 734 fps , ES 31, with 6.1 Universal with the RF bullet. Since velocity will increase with deeper seating and lessen with shallower seating, should I increase the powder charge till I get into 900s area of velocity. Really looking for 850-900 fps with this bullet.
As a comparison, the Lee #68 bullet over 5.2 HP-38, seated at 1.25 is giving me 785 fps, but 87 ES.
My question is on powder charge and velocity. Due to the short bullet intruding less into the case, I'm getting way less velocity than published loads. I realize the published loads are for the #68 bullet. Hodgdon lists Universal with starting load at 5.8 gr for 889fps, and a max of 6.3 for 962 at 1.225 OAL. I'm getting 734 fps , ES 31, with 6.1 Universal with the RF bullet. Since velocity will increase with deeper seating and lessen with shallower seating, should I increase the powder charge till I get into 900s area of velocity. Really looking for 850-900 fps with this bullet.
As a comparison, the Lee #68 bullet over 5.2 HP-38, seated at 1.25 is giving me 785 fps, but 87 ES.