Well generally, i dont have a problem adjusting to rifle setups, UNLESS its a low mounted scope that i have to bend my head sideways to look through, its not a problem 90% of the time, but i know one instance where my cousin had a 10/22 with an archangel stock that looked like an AR. I dont know if anyone has shot one of these but they are fun open sights, with a scope i found my head completely sideways laying on the adjustable stock just to look down the scope, this was very uncomfortable and hard to get your sight picture up quickly, im not saying that a whole inch is the answer but just something a little higher than the norm i feel leaves me in a more (universal) position that i can quickley get on target. I understand where your coming from. and i do realize that height doesnt neccesarily play a part in scope position, but body type does and usally if your a tall guy, you might like Jimbo says have larger characteristics like a round or long face. this is where that 1/4-1/2 inch difference plays a part also taller guys generally have a longer wing span meaning if the rifle doesnt have a larger LOP its hard to scruntch everything into your shooting triangle and still manage to scrunch your neck to lay your face on the stock, in most cases i lay my cheek on the side of the stock and slightly tilt so really how tall the scope goes doesnt really hurt my shooting. Only when the scope is too short is there problems