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Polishing springs
Springs are very interesting marvels. Somebody discovered long ago, probably in the muzzleloading era before the advent of coil springs that a spring that is polished to remove all file and or machine tool marks will be a much smoother spring. Originally it was probably done to reduce spring breakage because any deep scratches from a file left near the major bends of a leaf spring will almost always result in a broken spring eventually. Might last a while but if it is gonna break it will break right on the file mark. Springs don't like localized stresses. And polishing greatly reduces these and spreads the tension evenly throughout the spring. A polished spring is smoother and faster and as a result the hammer fall is faster with less tension of the strain screw applied to the spring and that translates to lighter single action cocking effort and lighter double action trigger pull. If you want to take the time polish the entire spring. You just might be amazed at the difference.
Many competition guns will have polished springs as part of the tuning process.
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