Originally Posted by fergsgunshop
Looking for powder for my 550 dil looking do find a good powder.
Have loaded over 10,000 round of 45 ACP using W-231. When shooting conventional pistol competion using a S&W 25-2, indoors 50 ft, 185 LSWC, 4.4 grains. Using a Dillon 550 never had any problems, and was extremely accurate.
For outdoor 50 yards, used 4.8 grains W-231.
You may need to bump up the powder usage to make a 1911 function for softball, but the powder always fed correctly, and when measured did not vary.