greyhounder Posted January 20, 2015 Share Posted January 20, 2015 Have and have had 1911s in 45 and 9 so familiar with the platform. In 9mm to use as my example most come with 12 lb recoil springs and most of us who compete go to 9 or 10. Now in 40 Wolff lists the norm as a 18, yet all I have read shows most use 12s. Taking into account PF we use compared to factory why such a wide spread but not in 9? When both are high pressure rounds. Link to comment Share on other sites More sharing options...
2MoreChains Posted January 20, 2015 Share Posted January 20, 2015 Can't speak for Wolff, but STI recommends a 14 lb spring in their 5" .40 guns. From their FAQ: Q: What is the recoil spring weight in my gun? A: Compensated pistols 8 pounds 5″ 9mm guns 10 pounds 5″ .40 S&W guns 14 pounds 5″ .45 ACP guns 18 pounds 6″ 9mm guns 8 pounds 6″ .40 S&W guns 12 pounds 6″ .45 ACP guns 14 pounds Link to comment Share on other sites More sharing options...
greyhounder Posted January 22, 2015 Author Share Posted January 22, 2015 Wolff it seems uses Colts data or at least looks that way, have a 16lbs now and a extra 12 so give it a try. Link to comment Share on other sites More sharing options...
deadeye480 Posted March 1, 2015 Share Posted March 1, 2015 12# in SS40 and Edge 40 w/buffer, Maj. power factor loads. ISMI springs. Link to comment Share on other sites More sharing options...
bountyhunter Posted March 2, 2015 Share Posted March 2, 2015 My Para 1640 (5") came stock with a 18# spring. If going lower, I would definitely use a buffer. Link to comment Share on other sites More sharing options...
19852 Posted March 6, 2015 Share Posted March 6, 2015 I don't know if this helps but my stock Colt .38 Super Auto seemed to come with a #14 spring which worked with a variety of factory and minor PF loads. I am now using a #9 spring with a Dawson aluminum guide rod/buffer for minor PF loads. The gun cycles smoothly and so far no reliability issues. Link to comment Share on other sites More sharing options...
cnote Posted March 20, 2015 Share Posted March 20, 2015 what spring weight would you go down to if switching from .40 major to minor in a 1911???? Link to comment Share on other sites More sharing options...
superslowmo Posted March 22, 2015 Share Posted March 22, 2015 what spring weight would you go down to if switching from .40 major to minor in a 1911???? I would hazard a guess that if you are right around the 130-135 range to go with what is recommended in 9mm (10# or possibly a 12#). Link to comment Share on other sites More sharing options...
mike cyrwus Posted March 22, 2015 Share Posted March 22, 2015 10 or 11 ismi Link to comment Share on other sites More sharing options...
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