Sidelock vs. Boxlock: How to Choose the Right Fine Shotgun

Choosing between a sidelock and a boxlock is often less about right or wrong and more about how you shoot, what you value in a fine gun, and where you will take it. Both action types have powered the greatest days in the field for well over a century. Both can be extraordinary. The trick is to match strengths to your needs, then buy with a clear eye and a skilled gunsmith by your side.

At Game & Gun, we see both daily. We rebuild Victorian sidelocks that still astonish with the sweetness of their trigger pulls, and we tune tough old boxlocks that refuse to quit. Each has a character of its own. Knowing that character is the key to good decisions.

What separates the two actions

A sidelock mounts the working parts of the lock on removable side plates. A boxlock houses those parts within the central action body. That one choice cascades into differences in triggers, maintenance, aesthetics and cost.

• Sidelock locks are complex, layered mechanisms driven by V springs. They reward careful timing and produce a crisp pull that many shooters adore.
• Boxlock locks are compact and robust. Coil springs and fewer parts create a tough, easily serviced mechanism inside a strong steel box.

It is not a question of old versus new. Both designs date from the late 1800s and both have been refined to a high art.

At a glance: sidelock vs boxlock

Aspect	Sidelock	Boxlock
Lockwork location	On two side plates, accessible once plates are removed	Enclosed within the action body
Typical springs	V-shaped mainsprings	Coil springs
Parts and complexity	Many small parts, intricate timing	Fewer parts, simpler layout
Access for service	Side plates off, specialist skills preferred	Often a bottom plate or drop-out group
Trigger character	Very crisp, light pull when well built	Positive, a touch heavier on average
Strength and resilience	Strong, but stock has lock pockets to cut in	Very rugged, fewer cut-outs in wood
Aesthetic canvas	Large plates, ideal for lavish engraving	Cleaner, more compact look
Price trend	Usually higher at a given quality level	Usually more affordable at a given quality level
Typical use case	High art gunmaking, refined game guns	Hard-working field guns, high-volume use
Service difficulty	Higher, fewer specialists	Lower, more widely supported

Both designs can be exquisite. Both can be plain working tools. The maker and the gunsmithing often matter more than the blueprint.

How design choices feel in the hands

Shooters do not shoot schematics. They shoot feel. The mechanism inside the action shapes that feel in subtle ways.

• Trigger break: Sidelocks often deliver a very clean release with minimal overtravel. That can help on precise shots at long, curling birds or on testing clays. A good boxlock trigger is also excellent. The best modern boxlocks rival many sidelocks.
• Balance between the hands: The mass of a sidelock action is spread out across the plates. Many shooters sense a smooth, central swing that builds confidence on crossing targets. Boxlocks concentrate more metal in the action body, which can impart a steadier, slightly planted sensation.
• Recoil behaviour: A stout boxlock with coil springs and a compact action can feel unflappable on heavier loads. A very light sidelock can be a delight all day in the uplands, though you will feel a punch if you move up in payload without adding weight.

The biggest single variable is not action type. It is fit. Stock dimensions, barrel length, chokes and total weight decide whether a gun feels like an extension of your hands. Get those right and most of the action debate fades.

Durability and service in real life

Both action types are tough when well made. The differences show up at the bench and in the mud.

• Boxlocks have the reputation for being the field-tolerant choice. The self-contained action tolerates wet days and accidental knocks. Many have easy access for drying, cleaning and replacing a spring or sear.
• Sidelocks need a little more care. The locks are intricate, with small pins and V springs that demand sympathetic assembly. Stock inletting is more involved, which is why the better guns use superior walnut at the wrist.

From our benches:

• We see boxlocks that have fired countless thousands of shells with nothing more than fresh springs and an action tighten over decades.
• We also see sidelocks from London and Birmingham that are still tight, beautifully timed and joyfully crisp after a century, provided they have been kept dry and serviced by someone who knows the pattern.

Good gunsmithing is the leveller. At Game & Gun we fabricate springs, pins and extractors in-house, tighten actions, resolder ribs, reblue barrels and reset triggers. Whether your double is a classic Beesley-pattern sidelock or an Anson & Deeley boxlock, the right work keeps it right.

How much to budget, and where the money goes

Price tags reflect hand labour, materials and scarcity. A sidelock has more to polish, more to engrave and more woodwork around the lock pockets. This typically drives a higher cost for new builds and more time at service.

• Entry into fine doubles is usually kinder with a boxlock. Value for money can be astonishing, especially with older English boxlocks or well-made German and Basque guns.
• Sidelocks often carry a premium. With that, you get artistry and a certain romance. You also get a larger canvas for engraving, which is part of the equation for many buyers.

Running costs matter. A full overhaul of a sidelock takes more hours. A boxlock strip, clean and replace wear parts is faster. Plan for:

• Routine cleaning and lubrication each season
• Periodic Action tightening and ejector timing
• Spring replacement when fatigue appears
• Bluing or rust blue touch-up when needed
• Stock repairs or refinishing after hard years

We quote firmly after inspection, explain the work, and only proceed when you are comfortable. Transparency beats surprises.

Where each action shines

Different days, different strengths.

• High-volume shooting on driven days or waterfowl with heavy loads: a strong boxlock that soaks up recoil and shrugs off weather.
• Walked-up days, fast crossing birds, or clays where a crisp trigger helps: a well-balanced sidelock that breaks like glass and moves on rails.
• Harsh terrain with snags, brush and frequent travel: a compact boxlock that takes knocks.
• Heirloom quality, highest-level engraving, a showpiece that still works hard: a sidelock from a great maker, kept in tune.

There are always exceptions. A heavy, long-barrelled sidelock can be a machine on tall pheasants. A light boxlock in 20 bore is an upland dream. Try both.

The maker often decides more than the mechanism

Action type is only one line on the spec sheet. The reputation of the house and the execution matter hugely.

• London makers are famous for sidelocks that set the standard for fit and finish.
• Birmingham, Basque and German makers have built extraordinary boxlocks, many of which look modest until you put them to your shoulder. They work, and they keep working.

On the used market, an old English boxlock in honest condition can be a lifetime purchase. A lesser sidelock built cheaply can be frustrating. Look at the individual gun, not just the blueprint.

Ergonomics that matter more than the label

A gun that fits will hit. Action type does not decide fit.

Key checks:

• Length of pull and pitch to match your build
• Drop at comb and heel so your eye sits naturally along the rib
• Cast for your stance and mount
• Barrel length and profile for your tempo
• Chokes appropriate to quarry and distance
• Trigger layout you like to use

Single selective triggers can be brilliant on both action types. Double triggers offer immediate barrel choice with a lovely tactile rhythm. Choose what you shoot best, then have it tuned. We tune single triggers, set sear engagement, polish bearing surfaces and fit new trigger units where required.

Myths we hear at the counter

• “Sidelocks are fragile.” Good ones are not. They demand proper care and proper smithing, and then they last.
• “Boxlocks are clunky.” Poor ones are. Good ones are smooth, fast and elegant in their own way.
• “A sidelock always has a better trigger.” Often true, not guaranteed. We can make a boxlock trigger very crisp, and some sidelocks need work if they have been neglected.
• “Action type decides recoil.” Total weight, stock design and load decide more. Action type nudges the feel.
• “Engraving equals quality.” It is a clue, not proof. Some plain guns are masterpieces inside.

A practical checklist before you buy

Bring this to the gunroom. It keeps decision-making simple and honest.

• What will you shoot most in the next two seasons? Be specific about quarry and load.
• What is your comfortable carry weight for a day on your feet?
• Do you prefer single or double triggers? Why?
• How does the gun mount with your eyes closed, then open? Where is your rib picture?
• Can you dry fire both barrels and feel the triggers break cleanly and consistently?
• Does the safety feel positive? Are the ejectors timed and even?
• Is the action tight on the face with no feel of movement when you hold the barrels and try to rock them?
• Are ribs solid with no tell-tale buzz when lightly tapped?
• What is the proof status relative to the cartridges you plan to use?
• What is the service history, and which parts have been replaced or need attention?

If you cannot answer those, bring the gun to us. We will put it on the bench, measure it, borescope it and give you a straight view of condition and costs.

Where Game & Gun fits in

We are a Danish gunsmith workshop and outfitter. Our team handles the simple and the highly complex with the same standard: get it right first time.

What we do for fine doubles:

• Precision fitting of trigger units, barrels and mechanical parts
• Fabrication of springs, pins, extractors and levers in-house
• Action tightening and lock timing
• Soldering of barrels and ribs, ejector work, troubleshooting faults
• Hot and cold bluing
• Mounting of scopes, mounts and moderators where appropriate
• Stock repairs, refinishing and minor alterations to fit

We give firm quotes after inspection and explain the process. If a part does not exist, we make it. If a repair is marginal, we will say so before you spend a krone.

Choosing by scenario: quick guidance

• New to game shooting, want one gun to do most things: a quality boxlock with sensible weight, 28 or 30 inch barrels, chokes set for your ground. Reliable and fair on the budget.
• Seasoned shot, values trigger feel and tradition: a sidelock from a respected house, checked carefully for stock condition and lock timing, with stock dimensions set to you.
• Waterfowl and magnum days: a strong boxlock that sits down on recoil, rust blue for durability, easy access for drying after a wet morning.
• Upland miles on foot: a light, well-balanced double in 20 or 28 bore, either action, provided the fit is right and the trigger suits you.

Aesthetics and heritage

For many owners, a sidelock is also a canvas. Broad plates invite deep scroll, game scenes and fine bulino. Stocks are often cut from exceptional walnut to withstand the inletting. Pick up a best sidelock and you feel the hours that went into it.

A boxlock wears its strength with restraint. Engraving tends to be tighter to the fences and bottom plate. The look is purposeful and clean. Some makers add false side plates for decoration, though the true mechanism remains within.

Neither choice is wrong. It is about what makes you smile when you open the case.

Try before you decide: our fitting protocol

If you are torn, come to the workshop. We will:

1. Measure your current gun and your mount, then note any inconsistencies.
2. Select both sidelock and boxlock examples close to your target build and weight.
3. Dry mount with snap caps, assess trigger reach and break, and test for cast and drop.
4. Adjust with temporary shims or try stocks to show what a 5 mm change does for line of sight.
5. Agree on any mechanical work, from trigger clean-up to action tightening.
6. Price it clearly and book the bench time.

A few centimetres of stock, a small shift in balance and a well-set trigger change everything. Choose with that feel still fresh.

Care in the field

Action type has little to do with daily care. A few habits protect any fine double.

• Wipe down steel after every outing and let the gun breathe before you case it
• Avoid over-oiling the locks, which attracts grit
• Keep the breech face clean, especially around firing pin holes
• Dry out under the fore-end and around the knuckle after rain
• Check screws for movement without overtightening
• Schedule periodic inspections to catch wear long before it matters

We supply quality oils, waxes and cleaning tools in our shop, along with premium footwear and apparel for the days you plan to stretch out.

Ready to compare side by side

Bring your questions and your gun. Or bring no gun at all and a target brief. Whether you lean toward a crisp, elegant sidelock or a stoic boxlock that eats miles and weather, we will help you choose well, fit it properly and keep it singing for years.

Game & Gun is open for consultations. Book a bench inspection or a fitting, get a firm quote, and walk out confident about your next day in the field.