Here is a simple way we do it.
I set up 2 or 3 tables, and use each for either the smaller stuff, and the second for larger caliber. Third table is for rifles and shotguns only.
If a 357 revolver is used, then both the 357 AND 38 cal is fine, as the 357 will accept the 38. Keeps us from having any ohhh s### moments.

Thank you,

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Henry