Glock 34 recoil spring

[TRIGGER]

I purchased a Glock 34 and had the slide milled to lighten it up then bought a ported barrel. I can't get it to cycle. It stovepipes. I ordered a spring kit with 15, 13 and 11lb springs but none of them will allow it to cycle. The lightest spring I can find is 10 lbs. The gun will cycle with the 11lb spring and factory barrel but not the ported barrel. I'm shooting reloads that cycle fine in several other guns. Should I order the 10 lb spring?

 

[mike243]

I would buy a box of factory ammo that is a little hotter than your reloads, I would bet somewhere somebody has done this before just have to find the site where they posted it.

 

[DaveTN]

Did a gunsmith mill the slide? How was it determined how much weight could be milled off and the side still have the mass to function properly?

What powder (brand and amount) and what bullet (type and weight) are you loading?

It appears you can buy a 10 lb. spring, but it doesn't appear (from a quick check) the Glock Store sells one. That would be a concern for me.

 

[nso123]

This is pointing toward the barrel being your issue since it works with the factory barrel. Who made the barrel?