My shotgun length of pull is 15-3/16", but my rifle length (on bolts) of pull is arround 14.5 to 15"" I find LOP is more critical on shotguns is more critical than rifles (DGRs excepted). You can time with rifles to "mount up" and settle in, so I have a little more leeway. With a shotgun (at least the way I shoot) it simply must shot where I am pointing trying to adjust myself to the gun really ruins the shot. I will add that I'm about 6-1" and I had my shotgun fitting with a very reputable fitter. The question I've always had is where double rifles fit in...

Just some thoughts from a far from great shot.