Gun has always run like a top till just the other day when i took the timed hammer out and put the regular hammer in it for use in the 51, got done with the 51 and put the timmed hammer back in pack and put it in the SP89 again. Immediatly the 89 would only run about 3 or 4 rnds full auto then stop, pull bolt back and it fed a round and has a light primer strike.
Never had to shim the pack before but i shimmed it now and when i run it now it goes about 17 rnds threw each mag the first 10 rnds or so runing real smooth then the last 7 rnds or so it gets choppy??? sounds like a car with one plug wire disconnected then it quits and once again it has a rnd fed in chamber and light primer strike?
Using HK ejector, HK parts all the way around except the timmed hammer from HKparts.net.
Any clues? Dont think i can shim it anymore then it is.