The one and only time I've had a double rifle built just for me, I had to take several measurements to ensure the fit was "custom". Based on my submitted measurements, a LOP of 14-1/2" was deemed appropriate by the manufacturer. I later purchased a cheaper double in a smaller caliber for practice. This one had a 15" LOP and actually fits me considerably better than the 14-1/2" LOP. Does anyone on here happen to have a good means of estimating the appropriate LOP for a big-bore double based on measurements?