Pistols are tricky. I have completely scrapped a couple of pistol stocks at this point. What I do, it inlet the barrel and lock into the blank, ramrod hole is drilled as well. Then I draw the handle out by eye, even if I am looking at an existing pistol. I then largely go by feel. I have one now that feels great in the hand, but does not flow well or look good. I see several originals like that.
Cory Joe Stewart