When the pistol was new I took it to Ace Hindman in Kerrville, Texas to do some work on it. He installed a new trigger, guide rod with 26 lb. dual springs and did some polishing. Since then I have went to a single 26 lb. spring and the pistol has always cycled perfectly when using the original Norma 200 grain ammo (675-705 Ft lb.) or the equivalent. Do you think the spring tension is the problem?   

My carry gun is a Colt Delta Elite (1988). This pistol has had a small amount of work done on it. No more than "smoothing" a new pistol. I noticed something with the slide today and it got me a little worried. I've only shot 500 rounds through this gun at most. I don't see any other wear corresponding with this wear. I've never seen this on a 1911.

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