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Note that in the heyday of .45 ACP ammo in match conditioned M1911's, the wadcutter versions shooting commercial 185-gr. wadcutters were near twice as accurate as hardball pistols shooting the best arsenal or commercial 230-gr. round nose bullets. Many tests confirmed this with both versions tested in Broadway machine rests at 50 yards.
In talking with armourers in military shops building such arms, their opinions were that the commercial wadcutter ammo was loaded to tighter specs than any maker of hardball ammo. A popular opinion was that wadcutter bullets were seated straighter in the cases than round nose ones; they had less runout to the case long axis. Also, the pistol's movement during barrel time was less and more repeatable with wadcutter ammo compared to hardball stuff.
I doubt any bullet profile or weight and dimensional differences were enough to matter for the velocity range and distances they were used at.
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