A common method for sure. However, it really only works for me with shotguns. Rifles and guns with optics mounted bring in other dimensional requirements.
I had a custom rifle stock made using this method for the pull dimension, and once I got suited up in cold weather gear, I found it uncomfortable. I had an inch taken off of that stock. Short action and short scope tube meant I couldn't set the scope back far enough to be 100% in the eyebox without craning my neck.