I have been shooting 9mm in USPSA, and have decided to move to major and am going to get a .40 S&W gun to do so. I have been loading 9MM for a while now and want to load my own .40 as well. I understand that the .40 is considered a high pressure load, and found the following on the IMR site:
180 GR. HDY XTP 4" barrel
DIA: .400" COL: 1.125" fps pressure
HiSkor 700-X 4.6 970 34,600 PSI
PB 5.1 975 34,400 PSI
SR 7625 5.7 990 33,300 PSI
SR 4756 6.0 1000 33,100 PSI
HiSkor 800-X 7.2 1030 26,000 PSI
I was drawn to the HiSkor 800-X, as it claims a much lower pressure, and I have read that a slower burning powder is better in .40 I have also read that the 800X doesn't meter well. I am using an RL-550 to load with.
Is there another powder that is comparable, that meters better. I figure that the lower pressure will be good in the long run for the gun, and less likely to cause problems. Is there any way to deduce pressures of different loads? Most of the loads that I have seen elsewhere do not list the pressure.
Thanks,
Jim