S/42 fire test, jammed b'z of 115 ammo

[mario17]

Hi,
I just tested my "new" Luger 1942, S/42. Smith examined it before and told me that it's OK to shoot, I tried 115 gfain FMJ Fiocci and had like 10 of 30 FTE + FTL.
Even last shot didn't bring toggle up.

So far I read that I need to start with mag, is this correct you think?

What ammo is best to try ?
some guys advice more powerful ammo, is it 125?
All above is not FMJ, and I don't want to use it.

Please share your experience, I don't plan to fire it every day, just want to sleep good knowing that I have good condition gun.

Anybody know any good luger pro in SF Bay Area (USA).


Thanks
Mario