762rocstarr Posted October 26, 2016 Share Posted October 26, 2016 So I just bought a used 6 inch STI eagle with a bushing barrel. I'm really not sure what recoil spring I should be using or even what is currently in the gun. I'm shooting 175PF .40 and the slide has been lightened considerably. Any help would be appreciated. Link to comment Share on other sites More sharing options...
resortboarder Posted October 26, 2016 Share Posted October 26, 2016 (edited) And here I thought you were going to be asking about .40 minor loads. I was going to recommend using Titegroup behind cast lead so everyone's aware the train has arrived. My 2 cents: I'd recommend as light as possible w/o causing damage. Use an aluminum shock buff to gauge the wear. Measure O.D. when you put it in, and O.D. after a few hundred rounds. If it starts to deform or has a significant imprint from the slide, go up 1-2 lbs and repeat. I'm a big fan of the light spring (9 lbs) in my bull barrel 6.0, but it's uncut and has a few ounces more reciprocating mass than your gun so I've seen no signs of wear on my buff. Edited October 26, 2016 by resortboarder Link to comment Share on other sites More sharing options...
Aircooled6racer Posted October 26, 2016 Share Posted October 26, 2016 Hello: Use a 12.5lb ISMI recoil spring. Thanks, Eric Link to comment Share on other sites More sharing options...
Scott Steele Posted October 26, 2016 Share Posted October 26, 2016 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Intel6 Posted October 26, 2016 Share Posted October 26, 2016 I have a 6" limited gun with a lightened slide (to the weight of a 5") and busing bbl. I use the 12.5 lb recoil spring and 165 JHP's. Link to comment Share on other sites More sharing options...
Hammer Posted October 26, 2016 Share Posted October 26, 2016 I have a six inch with bushing barrel, lightened and I run an 11 pound spring with no problems. Power factor around 171. Link to comment Share on other sites More sharing options...
762rocstarr Posted October 27, 2016 Author Share Posted October 27, 2016 thank you for the replies! That will give me somewhere to start. Link to comment Share on other sites More sharing options...
redwoods Posted December 22, 2016 Share Posted December 22, 2016 12.5 ismi with 170pf loads 165gr bullets Link to comment Share on other sites More sharing options...
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