The stock drop is one of the fundamental measurements used to determine the correct fit of a rifle for the user's physical build and shooting style. It indicates the vertical drop of the stock relative to the aiming line and directly influences the eye position when the rifle is shouldered.
In smoothbore shotguns, the shooter's eye essentially serves as a rear sight. To achieve a natural shot, it must always be positioned in the same spot while shouldering, correctly aligned with the rib and front sight. An improper drop can alter the perception of the aiming line and shift the point of impact of the shot pattern relative to the observed target.
How to measure the crease
The drop is measured as the vertical distance between the ideal extension of the upper surface of the rib and certain points on the stock. The two main measurements are:
- comb or nose bend, detected in the area where the shooter's cheek rests;
- heel fold, found in the upper terminal part of the stock.
Measurements are usually expressed in millimeters. For example, a configuration indicated as 35/55 mm has a 35 mm bend at the front of the comb and a 55 mm bend at the heel.
The difference between the two measurements determines the slope of the stock's back. If the values are similar, the comb is almost parallel to the barrel line; if the difference is greater, the stock slopes more sharply toward the buttplate.
Fold at the nose pad
The comb drop determines the height at which the shooter's eye is positioned relative to the rib. It is therefore one of the most important measurements for achieving a natural and repeatable shouldering.
With a reduced drop, the comb remains higher and the eye is positioned further above the rib. The shooter can see a wider portion of its upper plane, and the shotgun generally tends to produce a point of impact higher than the aimed point.
With a greater drop, the comb is lower. The eye drops below the aiming line, and the rifle can produce a lower shot pattern.
A correct comb bend should allow the cheek to rest firmly on the stock without forcing the shooter to lower his head excessively or, conversely, raise it to see the target.
Fold at the heel
The heel drop is measured at the top rear of the stock. It helps define the overall angle of the stock and the position of the butt plate on the shoulder.
This measure affects:
- the stability of the support on the shoulder;
- the position of the head;
- the inclination of the comb;
- the perception of recoil;
- the speed of the shouldering;
- the ability to repeat the same position over and over again.
A stock that's too low at the heel can force the shooter to tilt their head and create an unstable foothold. A heel that's too high can make it difficult to properly insert the butt plate into the shoulder cavity.
Fold and sight line
When shooting a smoothbore shotgun, the weapon is typically aimed through an instinctive, continuous movement, rather than through the precise aiming used with a rifle. The eye's position relative to the rib must therefore be automatically achieved while shouldering the gun.
When the drop is correct, the shooter should feel the rib in the amount appropriate for the discipline practiced and see the front sight without having to voluntarily change the position of the head.
In general:
- a kick too high brings the eye above the expected line and can determine high pinks;
- a kick too short brings the eye below the expected line and can cause low pinks;
- An inconsistent cheek rest produces variations in the point of impact even when the theoretical drop is correct.
The actual result, however, depends on the interaction between the bend, facial conformation, neck length, head tilt, rib, butt plate and shouldering technique.
Bend and point of impact
The drop doesn't alter the trajectory of the pellets inside the barrel, but it does alter the position of the eye and therefore the way the shooter aims the gun. For this reason, a change of just a few millimeters can have a clearly perceptible effect on the target.
A shotgun intended for hunting is generally adjusted to provide a natural view of the rib and a balanced distribution of the shot pattern around the aiming point. Trap shotguns often use straighter stocks and higher combs, because the targets are generally moving away and rising.
In sporting, skeet, and hunting, different geometries are used, designed to accommodate the variety of trajectories and the technique used. Therefore, there is no universally correct measurement for every shooter and every discipline.
Bend, deviation and advantage
The crease should not be confused with the lateral deviation of the kick , also called advantage or, in international terminology, cast.
The difference is substantial:
- la crease describes the vertical lowering of the stock relative to the barrel line;
- la deviation describes the lateral movement of the kick to the right or left;
- il pitch instead it indicates the inclination of the buttplate with respect to the axis of the barrels.
On stocks intended for right-handed shooters, a cast-off offset can be applied to the right ; on stocks for left-handed shooters, the offset can be oriented to the left, called cast-on . These adjustments help place the eye exactly behind the rib without forcing the shooter to unnaturally turn their head.
The fold in different types of football
The shape of the buttstock changes the way the drop feels when shooting.
English football
The English stock features a pronounced pistol grip and favors a dynamic grip. The bend must be evaluated along with the thinness of the comb and the position of the strong hand.
Pistol grip
In the pistol grip, the hand is guided into a more stable position. The grip geometry, stock length, and drop work together to determine the position of the head and shoulder.
Monte Carlo Football
The Monte Carlo stock features a raised comb and a lowered butt. This configuration allows the cheekpiece to be kept relatively high, while simultaneously allowing the buttplate to sit lower on the shoulder.
Stock with adjustable nosepiece
The adjustable comb allows you to adjust the height and, in some systems, even the lateral movement and rotation of the comb. It is particularly common in competition rifles, where the eye position must be extremely precise and repeatable.
How to understand if the fold is correct
The evaluation should begin with a natural shouldering, performed without consciously reaching for the rib. When raising the gun to the shoulder with your eyes initially closed and reopening them after resting your cheek, your dominant eye should be correctly aligned.
The main signs of an unsuitable fold are:
- need to lift head to see viewfinder;
- need to squeeze the cheek excessively;
- excessive view of the rib;
- total disappearance of the rib or sight;
- consistently high or low rose rates;
- pain in cheek after shooting;
- difficulty repeating the same swing;
- tendency to correct position immediately before shooting.
The most reliable test is to verify the point of impact by firing at a control target at a predetermined distance. It's advisable to take multiple shots, as a single grouping can be affected by an imperfect grip.
Physical conformation of the shooter
The ideal fold depends on the individual's body type. Factors to consider include:
- neck length;
- cheekbone height;
- shoulder width;
- chest shape;
- dominant eye position;
- natural tilt of the head;
- used clothing;
- shooting discipline practiced.
A shooter with a long neck may require a different setup than one with a short neck and broad shoulders. Winter hunting clothing can also change the position of the stock relative to the shoulder and slightly alter alignment.
Systems for modifying the fold
In modern rifles the drop can be modified through different systems:
- interchangeable plates and shims, common in semi-automatics;
- adjustable nose pad, used mainly in target rifles;
- modular stocks with micrometric adjustments;
- wood processing performed by a professional footballer;
- controlled bending of the stock, practicable on some wooden stocks;
- making a custom football.
In shim systems, varying the inclination between the receiver and the stock allows for different drop values. Each shim must be used in conjunction with the locking plate specified by the manufacturer.
Improper assembly can cause a poor fit, damage components, or compromise the stability of the stock. Therefore, consult the specific gun manual before performing any repairs.
Bending the wooden stock
In traditional shotguns, the drop can be corrected through specialized stock processing. The wood is subjected to controlled heat and pressure to gradually alter its slope.
This is a delicate operation, conditioned by:
- wood essence and seasoning;
- fiber direction;
- presence of knots or defects;
- grip thickness;
- type of attachment to the bascule;
- amount of correction requested;
- previous repairs or modifications.
Improper bending can cause cracks, weakening, or breakage in the grip area. Repairs should therefore be performed only by a qualified gunsmith or butt buttsmith.
Bend and felt recoil
An incorrect bend can increase the discomfort caused by recoil. If the comb hits the cheek at an unfavorable angle, it can deliver a sharp blow to the face during firing.
Even a poorly placed buttpad on the shoulder concentrates the force on a smaller surface area and makes recoil more unpleasant. However, comfort depends on the entire geometry of the stock: drop, length, pitch, lateral cast, comb shape, and buttpad surface must be considered as a whole.
Frequent mistakes
- Evaluate the fold without holding the bag: Nominal measurements alone do not describe shooter fit.
- Confusing bend and advantage: the first is vertical, the second is lateral.
- Change multiple parameters at once: it becomes difficult to understand which adjustment produced the result.
- Checking the rifle with a single shot: more shots taken with a natural grip are required.
- Intentionally seeking the line of sight: In instinctive shooting the correct alignment must form automatically.
- Ignore the dominant eye: a cross-dominance can mimic a soccer problem.
- Working on wood without expertise: An incorrect modification can irreversibly damage the stock.
Why the fold is important
The correct drop allows the rifle to rise to the shoulder and sit naturally under the dominant eye. When the stock is properly adjusted, the shooter can concentrate on the target without having to search for the sights or adjust their head during the action.
A difference of just a few millimeters can affect shot distribution, comfort, and the consistency of the stock. For this reason, the drop must be evaluated along with all other stock measurements and confirmed through practical tests on the target.
A properly adjusted stock does not replace technique, but allows the shooter to apply it with greater naturalness, continuity and precision.
