Near as I can figure, Ruger times all their revolvers to drop the bolt early, to assure lockup and prevent overtravel. Unfortunately it creates a ring on the cylinder. Perhaps the lawyers thought they'd be sued if a 44 Magnum was fired a bit out of line with the barrel.
At any rate, removing material from anywhere in the internal parts is more likely to drop the bolt even earlier, rather than later, and material will have to be added, not removed to delay the bolt drop. No new factory drop-in replacement part will help because Ruger makes all the parts to size with little or no assembly fitting, to keep the price down.
First rule of gunsmithing, lock up or throw away the Dremel tool, it is incredibly destructive to fine firearms.
Flint