Brand new CZ-75B jamming issues

[Jesse1904]

thank you, I will go with a 13lb spring first to see if this will fix the issue since 14lb is OEM.

[1SOW]

A lighter recoil spring may help.
My 75B is using an 11# recoil spring for my 130+ PF comp. reloads and tosses the cases around 6-8 feet.  CGW lists this as properly tuned to the load.  Your WWB ammo may run better with one similar:  11#-12#.  14# is the stock 75B spring.
The CZ Custom 75s also come with an 11# spring normally.

[oldguy]

Many problems can be solved with good cleaning, cheap ammo especially steel cased stuff has wax on case this builds up in
chamber will cause a malfunction. I always use a brush on chamber. On a new gun I run them very wet have grease hitting my glasses not unusual but for me it works, my 75B has never failed, reloads or walmart stuff however I will not use steel cased ammo in any of my guns.

[Spyder433]

I had this same issue with my 75B Omega. Contacted CJW (was planning some new parts anyway, figured I would get there input while I'm at it.) they told me the cz75b is is set up from the factory more towards defensive +P ammo. And cheap range ammo (they named win white box specifically) may not cycle correctly. I stopped shooting it and have not had a jam since. I have had good luck with federal aluminum case though.

[zmr]

if i had to guess i would still blame the ammo. My cz75 will run everything 100% except winchester white-box and aguila (which comes out of a former winchester factory). I suspect that that aluminum cased ammo is probably underpowered as well.

[1SOW]

Tecnos makes Aguila in Mexico at a plant  previously set up by Remington .