Accuracy with a pistol starts and ends with a [good repeatable] grip on the gun,without that you will have the Devils own time ever mastering it.If the grips hurt your hands find something that dosn't,or cut, sand off every thing that hurts.
After market grips for the Blackhawk are pretty easy to find or make your own.I like something with a filler behind the guard to take out the finger bite then make them fit your hand.