I've been working on my guns for around 35 years, and always kept my S&W's lubed with oil/break free. I have read several articles that profess, "If it slides grease it, if it rotates oil it". Having some extra time on my hands lately, I disassembled a few S&W's and did that, put grease on the rebound spring slide, and the hammer block channel in the side plate. I was amazed how much smoother the action felt.
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