I dunno about "having to trim handgun brass" ... betcha oe can beat any load by trimming (alhough I've yet to do it - & that after 35+ years) ... still, I betcha you could make it better. Seems that anything adding to extra consistancy would make it better. &, and but, maybe hard to tell in any revolver distance.
I shot a duck once, dead center, at about 650 yards (a .357 cast home=brewed bullet) - somewhat of a fine-tuning of "a load" - a "fine-tuning" that's worked for "a while" in mine.
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