Glock Question

[Ganderite]

I have been doing load development for a Glock 31C (357Sig, ported barrel/slide)

It seems to prefer the lighter loads. The recoil springs feels quite a stiff. Somewhere in m,y junk drawer is the recoil spring from a Glock 22 (40S&W). Are the two springs the same, or is the 40 a bit lighter?

Should I try to find it?

 

[Boomer]

I know I don't have to tell you, but for purposes of general consumption, the danger of too light a spring is twofold. First there's a reliability question. If the spring is insufficient to bring the slide forward with enough force to strip off the subsequent round, chamber it, and bring the slide into battery, the gun won't fire. Secondly is the problem of excessive wear to the gun. If the spring has insufficient strength to cushion the rearward travel of the slide, the gun is exposed to accelerated wear, and if the situation is extreme, it could become a safety issue. In an extreme example, should you be shooting reduced loads in the 16,000 psi range, with an appropriate spring for that power level, there is no a problem, but should you neglect to swap out the springs, and were to resume shooting 40,000 psi loads, problems may result. That of course is not what you're talking about. The fact is that the .40 S&W typically runs at 35,000 psi, so isn't that far behind the SIG. Glock's engineers possibly spec'ed a slightly less powerful spring for the .40, relative to the .357 SIG, but I believe that's unlikely.

 

[B]

Factory standard weight for both is 17lbs.

 

[Protege]

Factory standard weight for both is 17lbs.

I believe this is correct. Factory weight for 17/22/31 is 17lbs. And i think it's 17lbs for the 34 and 35 as well.

 

[Ganderite]

Thanks guys.

Since I have a spare spring assembly out of a 40, I will clip 2 coils and use it as a reduced power spring for both calibers.

I don't have or use any factory ammo and each gun has a load developed for accuracy, which happens to be about 80% of full power. The 357 brass is just dribbling out, so a weaker spring would help.

 

[Avenida]

what is the purpose of a light load? if you are planning on using this for competition then you have to make power factor.
Never had an issue with a Glock so I am assuming your loads are way under powered.

 

[Ganderite]

123 gr plated bullet at 1000 fps and 130 LRB at 900 fps. They happen to shoot very accurately.

 

[jperos]

I have a G22 and a G31 barrel that I swap out one for the other when I want to shoot .357 Sig. I use the same spring for both and it works perfectly.