Thanks for all the replays. The answer to the spring question, the spring replacement kit was Wolff. To the hammer spring comment, I will admit it hadn't crossed my mind, and you are correct, it does have a lot to do with the energy needed. We stopped swapping springs back to,the old, when going back to the old recoil spring and using the heavier round gave good operation.

The cleaning and polishing, Roland sliding out of chamber fix were all done prior to the spring replacement. Thanks for the suggestion, but I was ahead on that one.

The mags are new s&w new ones, plus the one original one that came with the gun. The problem is an equal opportunity one, and occurs with all the 4 mags that I have.

Thanks again for,your thoughts and your time.