New to Lugers, here's mine. goal - decent shooter

[beaniam]

I picked this up yesterday at a local shop. Paid $475. Info I was given is that it is a parts mix Mauser. I'd love some more info though. I'm new to lugers so sorry if I get some of the terminology/part names wrong.


I really no nothing more about it other than that...
Here's the info I can provide... Top of chamber is marked 1940 over what looks to be an area ground off at some point. Left side of chamber 1656, front of frame above trigger guard 5195, trigger plate 01, toggle group 42, 36, right side of chamber 655 eagle markings, magazine FXO 37, bottom of barrel "made in germany".

I purchased this as I wanted an occasional shooter however the first time out today shooting american eagle 115gr fmj I got mostly failure to feeds and a few failure to extracts. Most often the toggle link would stay back like it was a last round hold open, sometimes it would stay halfway up until I tapped it forward to strip another round. The gun was thoroughly cleaned and lightly greased before the range trip.

I ordered the mixture of different weight wolff recoil springs as well as a new mecgar magazine as I didn't really want to start tearing the original magazine apart to replace the spring. I believe it also comes with striker springs however I didn't have any missfires. Just a lot of failure to strip a round and a few fails to eject. Are these good things to try changing out first? Any other suggestions? I've read some people have no problems shooting normal modern 115gr and others have to go with a 125gr ball ammo.