Sometimes the answer is too simple and thus it is overlooked. The original hunting rifles were very often used for more than just shooting the prey. The rifle also served as support when walking in the brush and when secured to an animal, vehicle or crate, the idea was that the extra wood both protected the barrel and created a easier to secure and handle item. If you noticed when the transition to a reduction in the barrel covered length, the new product was called "Sporting or Alpine" models. This signified that they were to be carried by the strap, on your back and tended to weight less overall. The Gentlemen Hunter expected his rifle to be easier to hold and a work of art, denoted by the high quality wood and accompanied wood work on the stock. It was also perceived that the overall balance of the rifle could be better adjusted for sighting, when the full length stock was rested on a surface with no drop from barrel to stock . The original designer's idea was to create a rifle "Fit for A Gentlemen" but in any hunting expedition, the gentlemen had to be able to use it as he deemed fit. You can note in old pictures the many uses of their rifles.