Original load was an 8 gram 123.5 grain truncated cone FMJ at a Vel of 1032 to 1095. Come close to that and it should cycle correctly. An over speed will cause bounce back of the toggle making feed problems. The problems look just like wimp load problems. A bit of other info. In my personal P08s and what I tell customers. Replace all the springs with a Wulff P08 spring kit. Grease the original springs and put them in a bag with the pistols maker and Ser number. Here is some good history if you are interested.

http://cartridgecollectors.org/intro...tro9mmpara.pdf