Casting 9mm for JR carbine

Here's what I'm doing for my JR 9mm:
Lee 356-125-2R mold with water cooled COWW's, then powder coated with Tool Blue, sized in a Lee 9mm sizer.
Used Unique, x700 & W571 and all seem to work well....but as other have mentioned, dirty as fug in the blow-back, but....NO LEADING what-so-ever
 
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