Final update pistol functions as it should

Loaded single rnds in the mag into gun chambered rnd then removed magazine gun fired and recocked every time did this for 50 rnds

then went 2 rnds per mag for another 100 rnds all ok

for 50 rnds we went 3 rnds all ok

last 50 was 4 rnds per mag all ok

so I am confident this gun is working correctly

we used win white box 115gr
Remington UMC 115
blazer brass 124
and a few dozen reloads which would NOT cycle the action as they were too weak

I believe it was the non fitted repro side plate that cause the problems after some fitting yesterday seems to be fine now

Thanks for the input and advice!

Good deal. It's always nice to see a Luger problem solved successfully.