A tall, slim person requires a gun with a long, crooked stock, and rather heavier and made fuller behind the small, as this will fill up his want of a full face, and will better permit his eye a command of sight along the middle of the barrels, supposing the gun to be a double one. For a short individual a short, straight stock is required, and it should be made thinner behind the small, so as to easily permit access to the line of sight. If a person be in the habit of firing too low and behind a bird, if the stock be made a little straighter it will prove a remedy for the fault. That part of the stock where the cheek comes to rest should be full, as it gives more support to the line of fire. The heel of the stock should be in a straight line with the upper rib between the barrels. If a single gun, on a line with the barrel. The length of stock from the centre of front trigger to centre of butt-plate, from thirteen to fifteen and a half inches; a short person requiring the less measurement, while a very tall one might require the longest one. [Illustration: FIGURE 23.] The cut, Fig. 23, gives a better idea of what the stock should be. Place a rule or straight-edge upon the rib of the gun, and long enough to reach from the sight of the gun over and beyond the butt. Be particular that the straight-edge lies along the rib and touches it at both muzzle and breech. The measurement from _a_ to _b_ on the butt is what is termed the “drop,” and this may be from two and a half to four inches, according to the requirements of the shooter. The cheek of the sportsman comes between _c_ and _d_, and almost always touches the stock at this place when bending his head forward over the stock of his gun to take the line of sight. This part of the gun should command particular attention. Another point of considerable importance to observe is, that a due regard be paid to the proper fall of equipoise or centre of gravity of the gun when stocked and ready for use. This centre of gravity should fall at a point about two feet two inches, or perhaps an inch more, from the heel of the butt. In this case the arm is easier to handle and easier to carry. If the breech be too light, lead may be inserted to advantage in the butt, the butt-plate being removed for that purpose. _Dimensions for Single Gun._—The following may be considered very good dimensions for a single gun stock: Whole length of stock, from butt to cap, two feet two inches; length or depth of butt, five and a half inches, with a trifling concave surface; width of stock at butt, two inches; from point of centre of the lock-tumbler to cap, eleven inches; width of stock before the guard, one inch and three-eighths, and made nearly square.