Dan Wesson manual states that they need a 500 round break-in period. During this period, shoot only roundnose ammo, and don't clean the gun. Just lube it every 100 rounds, especially the slide rails and the barrel lugs, and up by the bushing. Don't clean off the old lube, just ad more. The tolerances in a DW are really tight, and the oil/grease mixed with powder residue acts like jewelers' rouge and polishes bearing surfaces. After 500 rounds, clean it, oil it, and you're good to go.
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