Meant to get this done sooner, but here it is.
Load is 6.7 grains of Unique under a 225 weight TC bullet.
Brass was used mixed makes, made up of 50, small pistol primer pockets, and 50 large pistol primer pockets.
Selection process was to load all 100, then select 7 from each primer size, and then pick 3 from the remaining group. So basically, I loaded 50 each of spp and lpp, and selected 3 from each group at random.
Results for SPP loads
1) 943 fps
2)931 fps
3)941 fps
Average velocity is 938 fps
Results for LPP loads
1) 925 fps
2)972 fps
3)935 fps
Average velocity is 944
Average difference between the 2 is 6 fps.
I do not think there is enough difference in the primer size to even worry about it.
Also tested my favorite load of 6.2 grains of Unique ;
1) 874 fps
2)870 fps
3)820 fps
Average velocity is 854 fps. Damn near a perfect velocity for the 45 acp in the 1911 platform with factory springs per Colt Specs.
All loads chronographed, gun was Colt 1911 with 5 inch National Match barrel.
So, there ya go, for those who had questions or concerns.
Disclaimer; start at manufacturer suggested load data for beginning loads and work up.
Exiting comment; An average velocity of 944 fps with a lead 225 weight bullet is nothing to sneeze at. One of my favorite factory loads was a 40 S&W 180 weight XTP for outdoor and general use. It is advertised at 1100 fps, and that was with blended powders. I tested it and it is very close to advertised velocities.
For special purposes, I can easily load the 45 acp to blow any 40 out of the water. the 6.7 grains of Unique load and bullet combo is not showing any signs of high pressure, and I could easily bump this load up considerably if needed, although, I dont want to abuse my gun.
But the next time anyone asks what the 45 can do that the 40 or 9mm cant, I have something for 'em.:wink: