From the standpoint of geometry and physics, only the piston pin, rod bushing, and some surrounding material is reciprocating weight (and above the pin centerline it's moving in the opposite direction).
Only the crankpin, big end shells and part of the cap and beam are rotating weight (and below the crankpin centerline it's moving in the opposite direction).
The rod beam between these 2 centers is both reciprocating and rotating weight, with the percentage of each determined by its portion of the rod's length (not the weight).
More of my comments on my site here: http://victorylibrary.com/mopar/crank-bal.htm