Wasn't rocket science to me at all. I used a FCD with my lead .45 loads sized to .452
Upon pulling a bullet it was indeed reduced by .001 and i was getting moderate leading in my barrel. Once i seised to use the FCD the leading went away completely. Bullet size is King to reduce barrel leading.
Plus is the bullets still feed flawless in all my .45's without the use of the FCD so no need for it really.
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