Weihrauch HW 110 Owner’s Guide

The HW 110 is a PCP rifle built around a fixed cartridge system, so filling, venting and general care all follow their own routine. This applies across the range, whichever version you’ve got:

• K is for Karbine, the shorter carbine-length build, as on the HW 110K
• T is for Thumbhole, a stock with a hole for the grip hand instead of a separate pistol grip, as on the HW 110T Laminate Adjustable
• KT is for Karbine and Thumbhole combined, a short carbine with a thumbhole stock, as on the HW 110KT Laminate
• ST is for Soft Touch, a rubberised soft-touch finish on the stock, as on the HW 110 ST

None of that changes how you fill, load, vent or maintain the rifle, the fixed cartridge, magazine and trigger system work the same way across every version, so this guide applies whichever one is sitting in your cabinet.

How Do I Fill The HW 110 With Air?

Connect your fill probe to the quick fill system on the cartridge and watch the pressure gauge as you fill. Fill slowly, the whole process should take at least a minute, since filling too quickly can damage the valve and seals. Stop once you reach the maximum fill pressure.

That fixed cartridge is central to how the whole rifle works, so it’s worth understanding properly.

Is The HW 110’s Air Cylinder Removable?

No, the HW 110 uses a fixed cartridge built into the rifle. You always fill it in place rather than taking a cylinder off separately.

What’s The Maximum Fill Pressure For The HW 110?

The HW 110 takes a fill of up to 200 bar. Always check your own rifle’s markings, but treat 200 bar as the ceiling.

Never push past it, filling, using or storing the cylinder above this pressure risks personal injury, which is separate from the seal damage that comes specifically from filling too fast.

How Many Shots Per Fill Can I Expect?

Shot count depends on your calibre and how you’re shooting, but a full fill on the HW 110 will comfortably get you through a solid session before you need to think about topping up.

Keep an eye on the pressure gauge as you go rather than relying on a fixed shot count, since that gauge is the most accurate way to know where you stand.

With the rifle filled, the next step is getting it loaded and ready to shoot.

How Do I Load The Magazine And Cock The System?

The HW 110 holds a 10-shot magazine. Load pellets into it one at a time, checking they sit flush and aren’t damaged.

To fit the magazine, push the magazine lever up and hold it there, slide the loaded magazine in from the side until it’s fully seated, then let the lever drop back down to lock it in place, you may need to rotate the magazine slightly to align it. Pull the cocking lever out and back fully to open and cock the action, then return it to the closed position, which feeds the first pellet into the barrel.

What Calibre Does The HW 110 Come In?

The HW 110 is manufactured in .177 (4.5mm), .20 (5.0mm) and .22 (5.5mm).

What Do I Do If A Pellet Gets Stuck In The Barrel?

The golden rule here is never load a second pellet behind the stuck one. Fit an empty magazine instead, cock the rifle, and fire it towards a proper backstop in a safe direction, which resolves it more often than not.

Still stuck? Take the magazine out, open the action, and work a cleaning rod in from the muzzle end to push the pellet back towards the breech, where it can be removed through the open action.

If you can feel more than one pellet lodged in there, stop entirely and get it to a gunsmith, pushing on regardless risks scoring the rifling.

Any Tips For Better Accuracy With The HW 110?

Avoid resting the rifle directly on anything hard, a filled sandbag under the front stock makes a noticeably better rest than a table edge or window sill, and never let the barrel or cocking barrel itself take the weight.

Squeeze through the trigger rather than snatching at it, and stay on aim for a second or two after the shot rather than lowering the rifle straight away, follow through matters more than most new shooters expect.

Pellets vary a fair bit between brands, so it’s worth running a few types through your rifle to see which one groups tightest, heavier, well made diabolo pellets are usually the better performers.

How Do I Know When The Cylinder Needs Refilling?

Watch the pressure gauge mounted near the quick fill system.

Shooting on when the gauge drops into the low range isn’t just an accuracy issue, Weihrauch specifically warns it can cause a pellet to stick in the barrel, calling it a potentially dangerous situation since the rifle can seem unloaded when it isn’t. Top up before the gauge gets low rather than trying to run it right down.

How Do I Safely Empty The Cylinder Before Storage?

With the rifle unloaded, magazine out and safety on, lay the rifle on its left side and insert the Allen key that came with it into the hole above the safety lever. It’s worth keeping that key somewhere you won’t lose it, since it’s the only way to vent the cartridge.

Turn it slowly until you hear air escaping, then keep it open until the gauge reads zero and you can’t hear any more airflow. Close it back up by turning the key the other way. Do this roughly every 20 fills, or if the rifle is going to sit unused for more than about four weeks, so any condensation trapped inside can escape.

Can I Adjust The Trigger On The HW 110?

The HW 110 uses the same two-screw system as other Weihrauch match triggers, adjusted with a SW 1.3 Allen key, a different size to the SW 2.5 key that comes with the rifle for venting. Since it isn’t included in the box, this is one you’d only need if you or a gunsmith were actually going ahead with an adjustment. Screw B sets the trigger weight, turning it right makes the pull heavier, left makes it lighter. Screw A sets the travel to the letoff point, turn it left if you feel any creep as you take up the trigger, or right if the shot breaks with no felt resistance at all.

Weihrauch’s own guidance is to leave the trigger as supplied. If it does need adjusting, a qualified airgun gunsmith has the tools to measure the engagement properly rather than guessing by feel, which is really the only safe way to do it. If the trigger unit is ever fully detached from the frame, it must go back in uncocked, as reinstalling it cocked can cause the trigger to malfunction.

How Do I Clean And Look After The HW 110?

Always check the rifle is unloaded and decocked first. Wipe the metal parts down with a lightly oiled, lint free cloth after use, especially if it’s going to sit unused for a while, since this protects against rust.

Clean the barrel from the chamber towards the muzzle only, using felt cleaning pellets or a soft cleaning cord, never a wire brush or steel tipped rod, which can damage the rifling. Use oil sparingly, and only oil that’s free of resin and acid.

Once the fill and venting routine becomes second nature, the HW 110 is a genuinely consistent rifle to shoot, the fixed cartridge system just becomes part of the rhythm rather than something to think about.