The dimensions of individual bones relative to mass can very a substantial amount, so even if a femur is say 10% longer than another it does not establish that the longer femur came from the heavier individual, or even if it is heavier, that it is by 10% cubed.
10% or 110% cubed? Anyway, the allomectric studies probably would not scaled it up by a full factor 3. (Most volume/area allometric scale is about .75 instead of 0.66 from pure geometric scale.)
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Roberto Takata