Mr Bob, this is Mr. Bill and it is good to hear from you on the 1911 .45 ACP and your 2011 9MM. I am not to compete with you and it is always fun to see what happens when you have to change out any spring, light or stronge. I have two 1911's, "First" Ruger SR1911, 5" Barrell .45 ACP and a...
Great choice of 12 lbs. I have had questions on
1911 Springfield A1 about strengthening the .45 ACP to .45 ACP +P strengths. I found Wilson Combat and they help me answer questions and found the correct recoil springs at 14 to 16.5 pounds for .45 ACP. Best wishes on that 12lb. Spring, the...