[FMM]

I have two High Standard Supermatic Citations. One frequently fails to cock. I have changed all the springs in the slide, and, if I move the slide on the other gun the the problem goes with the slide. The rails on the slide look good.
Any suggestions as to the cause of my problem.

 

[Darkker]

With a 22LR, I would suggest a deep(thorough) chamber/barrel cleaning.
If the chamber happens to be slightly tight/short, and it's a bit dirty it can cause function issues.

Cheers

 

[JBelk]

If it goes with the slide it must be the cocking surface of the slide that's short cocking the hammer.
It's possible the disconnector is operating at a different spot and messing up the re-engagement. Using fired cases to prevent chamber damage, dry fire and carefully withdraw the slide and feel-hear the sear engage and find out where the disconnector is active.
Is the hammer following down, or is the sear failing to engage?

 

[FMM]

If it goes with the slide it must be the cocking surface of the slide that's short cocking the hammer.
It's possible the disconnector is operating at a different spot and messing up the re-engagement. Using fired cases to prevent chamber damage, dry fire and carefully withdraw the slide and feel-hear the sear engage and find out where the disconnector is active.
Is the hammer following down, or is the sear failing to engage?

Could the recoil spring be too stiff and be the cause it the problem? If that is the case where do I get a 5 pound spring. There are springs on the market for the High Standard but they have to be cut & cutting them to the correct length is guess work.

 

[JBelk]

You have to assume the factory put the right spring in it and they don't get stronger. The gun is a straight blow-back action. There is only friction and spring resistance that determines slide operation. Assume the spring is right (they installed thousands of them) and find the excess friction IF the slide isn't operating. Your problem seems to be in the hammer and sear connection but you can tell for sure by dry-firing and feeling the operation by hand.
Check the disconnector and sear engagement.