I've recently nabbed a G20C, that was purchased as a backcountry backpacking sidearm. I've read all about the needs for tuning it to deal with full power/heavy loads. My plan for the gun is to carry it at the end of August on a 6 day backpacking trip, loaded with 200grain underwood.
So with all that being said, it appears that a 20-22 lbs spring will be the ticket from what I've read. I'm planning to order ammo and and spring assembly tomorrow, so that I can get plenty of time and practice with it. Anybody have any feedback that would lead me away from that? Looking at this:
https://www.midwayusa.com/product/3415156761/wolff-recoil-spring-glock-17-20-21-22-24
I have a 3rd gen 20SF and use the Wolff non captive rod and 22 lbs in mine. I have a 24 lbs spring just in case I develop or test heavy loads.
Measurements taken:
Glock 20Sf Factory spring test
It takes 5lb 3oz to start the slide to move from the locked position
Full retraction at 18lb 0oz at lock open
Glock 20SF spring test Wolff Gun Springs 22lb RSA installed
It takes 6lb 4oz to start the slide to move from the locked position
Full retraction at 22lb 9oz at lock open
22-Slightly over a pound difference 1lb 1oz to start the slide to move from the locked position
24-Slightly over a two pound difference 2lb 3oz to start the slide to move from the locked position
22-Slightly over a 2 pound difference 2lb 9oz at lock open
24-Slightly over a 6 pound difference 6lb 1oz at lock open