How do you guys determine the length of pull on your rifles? I have long arms and like the rifle set up with a long LOP but in doing this I have to scoot the scope really far back to avoid craning my neck. Im using a NF base on a 700 with a McM A4 and my scope is mounted as far back as possible. I still have to stretch into it so Im going to reduce the LOP but thats going to make the stock less comfortable.