I use Lasercast 158 grain SWC in full power .357 mag loads that reach 1350 fps out of my 4" S&W Model 28 with no leading whatsoever. I shoot almost nothing but cast lead out of all my handguns and have yet to have any leading in most of them. The sole exception is my Springfield Mil-Spec in .45 acp, and the amount of leading I've seen there isn't much and cleans up easily.
Mike
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