if you can, get ahold of a rifle that "feels" right to you and measure the length of pull, Drop of the butt stock and also, cheek piece. Also look for cast off. 1/8" or so can make a difference in feel. When I made my first rifle for my friend, I had him hold the blank stock with barrel inletted and marked on the stock where his cheek rested on the wood and also taking a measurement from his shotgun for the length of pull. Essentially, it was fit to him. After he shot it for the first time, he said, "That is the smoothest rifle I have ever shot" Also, look at how your hand grips the wrist. a little bit of extra concave shaping where the plam of your hand rests, can give you a more comfortable "feel" as well.