[kraigwy]

Regardless of any pistol/revolver/rifle, cast bullets should be sized to make them uniform. They often come out a tad out of round because the mold may not have locked up propertly. It don't take much and you probabley can't see it, but I've found sizing helps accuracy.

Even if you cast .451 bullets and want a .451 bullet, you should size them in a .451 sizing die.

Yeah you can mic and check every bullet, but its faster to just size all of them.

Casting, like any reloading procedure should be consistant.