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Posted: 10/18/2010 3:02:22 PM EDT
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I had a strange occurance the other day but it was quickly fixable. While taking in some practice with my E4 for an upcoming 3-gun match on saturday I started to get light primer strikes on three different types of ammo. I knew my E4 liked thest types of ammo because I have run literally thousands of rounds without incident. I thought I might have firing pin problems so I field stripped it only to find the firing pin in great shape. As I was re-assembling it I noticed the end of the op-rod (side that contacts the piston) backed out a few turns. It was just enough to let a fresh round chamber but not enough to go into full battery. The rod was a hair longer because the end backed out some and was just enough to change the head spacing.
SIMPLE FIX...................I put a couple drops of blue loc-tite on the threads and tightened the end of the rod down. It runs like a top now with all ammo including crappy Wolf and lacquered steel cased Hornidy. MadDog 
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jag: when I backed the op-rod tip out enough to clean the threads so I could re-loctite it, it had that red tint of the stronger loctite but thought differently because it shouldn't have backed out. Hopefully the blue loctite will hold. If not I have some red that I will use on it.
Thanks jag for the info, MadDog
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