my 10mm did the same thing [jammed] when i first got it. after about 200 rounds it stopped.the cool thing about the eaa,s are that you can make them 22lr,9mm,38super,40cal,10mm, or 45. is yours a 10mm? if so watch for the crack to appear in the slide.thats the only caliber thier having problems with. as we speak mines headed back to EAA.
JUST KEEP IT OILED AND RUN SEVERAL BOXES THROUGH BE FORE YOU GIVE UP ON IT.