Thanks guys for the response. Don't want you to think I'm a green-horn with rifles and shooting because I'm not. It's just that the measurement between the bicep and the dip joint makes no sense to me. Somewhere between those two measurements you have to grip the stock and there can be a huge difference in stocks from the grip to the trigger shoe. I need a 15-1/2" LOP when using that method, but the tip of my finger is at least 1/2" in front of the trigger on a Mcmillan Classic Sporter or HS Stock when I hold the grip. Also, when ordering stocks in the past, the manufacturer's acted as if 1/4" makes a huge difference and I should not go any longer than about 14inches.
It seems to me like the stock mfg's should somehow list both of those measurements about there stocks since we don't always have the luxury of holding every different model when ordering. That's my take on it for whatever it's worth.