mainspring balancing act!

gunbugs · 05-19-2026, 01:03 AM

Winchester SG9W is "service grade". I like it in my Walther MPK, as it runs the gun a little faster, as well as the SBR AR9. Just a little more "snort". I keep it out of the Lugers though, as it is a little snappy for the old guns in my opinion.

G.T. · 05-21-2026, 06:08 PM

Hi to all, I agree with gunbugs and would rather mess with the mainsprings rather then the higher velocity ammo. When everthing is as right as I can make it, the Luger will run on the WW White box without any issues. Problem is, sometimes the issues affecting the function of the toggle assembly are really hard to determine. When trying "stronger" ammo and the problems go away, it at least shows you that the geometry is pretty close to correct. Interesting quest! Best to all, til....lat'r....

05-21-2026, 06:08 PM	#2
G.T. Lifer Lifetime Forum Patron Join Date: Jun 2002 Location: Chandler Arizona Posts: 3,550 Thanks: 1,361 Thanked 3,778 Times in 1,028 Posts	ammo preference? Hi to all, I agree with gunbugs and would rather mess with the mainsprings rather then the higher velocity ammo. When everthing is as right as I can make it, the Luger will run on the WW White box without any issues. Problem is, sometimes the issues affecting the function of the toggle assembly are really hard to determine. When trying "stronger" ammo and the problems go away, it at least shows you that the geometry is pretty close to correct. Interesting quest! Best to all, til....lat'r....

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05-19-2026, 01:03 AM	#1
gunbugs Lifetime Forum Patron Join Date: Sep 2013 Location: Fairbanks, Alaska. Home of the best moose. Posts: 684 Thanks: 375 Thanked 1,231 Times in 415 Posts	Winchester SG9W is "service grade". I like it in my Walther MPK, as it runs the gun a little faster, as well as the SBR AR9. Just a little more "snort". I keep it out of the Lugers though, as it is a little snappy for the old guns in my opinion.