BRadcliffe Posted April 24, 2022 Share Posted April 24, 2022 I recently entered into the 1911 world with a Springfield Range Officer Target in 9mm. I plan on going with an EGW ignition kit and not sure which main spring to go with. I will be shooting almost exclusively Atlanta Arms 100gr/1090fps loads in steel challenge. So the question is do I go with the 17 or 19 lb main spring? What about recoil spring for something this low? The Wilson Combat site is showing 115-120pf for a 8lb spring, so do I go down to 7? Link to comment Share on other sites More sharing options...
OpenshooterMclass4lyfe Posted April 24, 2022 Share Posted April 24, 2022 (edited) I’d suggest getting a few different spring weights to test for the recoil spring And go with a 17pd hammer spring. Edited April 24, 2022 by OpenshooterAclass4lyfe Link to comment Share on other sites More sharing options...
ltdmstr Posted April 24, 2022 Share Posted April 24, 2022 I use 19 lb hammer spring and 9 lb recoil spring in 9mm 1911s/2011. Works great and is 100% reliable. Link to comment Share on other sites More sharing options...
OpenshooterMclass4lyfe Posted April 24, 2022 Share Posted April 24, 2022 I run a 17 with 2 coils cut and had no issues in any of my open guns with a multitude of different priners used. Even rifle primers ignite. The recoil spring is going to depend however. The lighter loads your going to want to play with those. Link to comment Share on other sites More sharing options...
gethirt Posted April 24, 2022 Share Posted April 24, 2022 I run a 17lbs mainspring with a Dawson extended firing pin in my .45 and it is 100% reliable. The firing pin stop with a flat bottom helps to reduce felt recoil too in my opinion. EGW makes them. Link to comment Share on other sites More sharing options...
zzt Posted April 24, 2022 Share Posted April 24, 2022 With 109 PF loads you will end up using a 7 or 8lb. recoil spring. It really depends on the gun. If it is a new gun, probably a 7 until it wears in a little. Your choice on 17 or 19 lb. mainsprings. I use both, because it is part of the tuning process. I also use an 18. For now, just pick one and use it. Link to comment Share on other sites More sharing options...
BRadcliffe Posted April 25, 2022 Author Share Posted April 25, 2022 Thanks for the responses everyone. I ended up just grabbing the Atlas Gunworks tune pack with 7 to 11lbs and both of the mainsprings from shooters connection. Link to comment Share on other sites More sharing options...
Postal Bob Posted April 25, 2022 Share Posted April 25, 2022 I run 17lb mainspring and a 10lb recoil in mine. I can go down to a 9lb. Problem comes when shooting certain magazines. My Dawson mags, when fully loaded, are hard to strip out the first 3-4 rounds outside of the gun. So when testing what recoil spring to use, always test with fully loaded mags, to make sure there's enough force to properly strip and feed the first round or two. Link to comment Share on other sites More sharing options...
BRadcliffe Posted May 12, 2022 Author Share Posted May 12, 2022 I was beating my head against the wall with this thing. It wasn't going in battery most of the time....until I checked this with a plunk test. Apparently the SA barrels can be tight. 5/50 rounds from a box actually fit. So my new question is are the KKM barrels drop in or require fitting? Are their chambers decent? I have them in glocks and work great, the "big" rounds fit no problem. Or option two - Does anyone know someone in the Atlanta area that can ream this factory barrel? Link to comment Share on other sites More sharing options...
Postal Bob Posted May 13, 2022 Share Posted May 13, 2022 (edited) I was always under the impression that KKM barrels have very tight chambers. I had for a Glock once many years ago, but too many problems with the tight chambers. And as far as the SA barrels, never had any problem with the two Range Officer guns I have, one in 9mm, one in 45. If factory rounds aren't seating, there's a defect with the barrel, and you should send the gun back to Springfield. Edited May 13, 2022 by Postal Bob Link to comment Share on other sites More sharing options...
RickT Posted May 13, 2022 Share Posted May 13, 2022 At one time we had six SA SS Loaded in 9mm. All had generous chambers. Just call Springfield and get an RMA. Link to comment Share on other sites More sharing options...
ltdmstr Posted May 13, 2022 Share Posted May 13, 2022 Sb able to send them just the barrel so the can finish ream the chamber. And sb a quick turn around. Takes about 5 min. to do. Link to comment Share on other sites More sharing options...
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