Newbie with S/42 feeding jams

[Panzerfaust1973]

Greetings All,

Let me thank everyone for all the amazing information provided about this unique firearm. I will show off my recently purchased S-42. It's a Mauser G stamped and refurbished back in 1997. I replaced the grips with a pair of Nill smooth walnut ones. I know this Luger has no collector´s value but isn´t it a nice shooter after all??? The BIG ISSUE is that I am getting quite more than an acceptable number of feeding jams when shooting. I´ve tried different ammo (always FMC from S&B and Magtech) and different mags (Haenel and Mecgar both in excellent shape).

Ammo? Magazine? Limp wristing? Weak recoil spring?

I am kind of lost with this...