Glock 20 FTF problems

[mt10mm]

I have been reading alot of people are having FTF problems with hot ammo. Some have went to 22lb spring with no help and others have went to 10+ mag spring with no help. Is this a possible feed ramp issue? sounds like the non nuke ammo runs fine.  What is everyones thoughts on this?

[enidpd804]

I've had a little more trouble with nuke-level stuff than Corbon/Winchester level ammo.  A rail-mounted light won't allow me to shoot anything hotter than .40 power reloads.  There are a lot of things that go on inside a pistol that make them work reliably.  Conversations with Glock, Inc. technicians have led me to believe that slide velocity is the biggest issue with their pistols; esp. in .40 and 10mm.  The last one I talked to recommended changing magazine springs AND the recoil spring if I was going to use hot stuff and/or run a light.   

[mt10mm]

I have had the same issue since glock was new. Whenever I shoot hot loads I rack the slide to chamber the first rd and after that I have to rack the slide again to free up a rd almost sideways on the right corner of the reed ramp. This happens with all three mags. This only happens with hot rds. Priv 180gr hp and other standard loadings cycle no problem. I have ordered a 22lb rsa with conversion from my 4th gen ro a 3rd gen recoil assembly. Hope this will fix it or its going back to glock.

[sqlbullet]

A heavier recoil spring is going to reduce the slides dwell time with the action fully open (less time for the magazine spring to push the next round up) and reduce the lock time to return to battery (faster forward velocity means less time for the round being fed to align itself with the chamber).

The heavier recoil spring does spread out the recoil however.  So if the FTF's are related to momentum in the rounds in the magazine related to the abrupt recoil, a heavier spring may alleviate issues.

At least these rules apply to 1911's.  In general I would think the same rules apply to a Glock. 

[mt10mm]

I am hoping it will fix the issue