Weihrauch HW 100 X Owner’s Guide

The HW 100 X is a solid choice if you’re moving into PCP rifles, largely down to how straightforward the removable cylinder makes filling and swapping air. This guide takes you through filling, loading the magazine, cocking, troubleshooting and the maintenance habits worth building in from day one.

This guide applies to every version of the HW 100 X:

• HW 100 X Sporter Laminate Adjustable
• HW 100 X T Laminate Adjustable
• HW 100 X KT
• HW 100 X KT Laminate
• HW 100 X T
• HW 100 XS
• HW 100 XKS

Got the HW 100 X Bull-Pup? Its trigger sits further back in the stock, so see our HW 100 X Bull-Pup Owner’s Guide instead.

How Do I Fill The HW 100 X With Air?

The HW 100 X uses a removable air cylinder with a quick fill system, so you connect your fill probe to the cylinder’s quick fill port while it’s still fitted to the rifle. Fill slowly and watch the manometer gauge on the cylinder as you go, stopping once you reach the maximum fill pressure for your rifle.

Always release any pressure left in the fill line before disconnecting, since trying to pull a pressurised fitting apart while it’s still under pressure can damage the seals.

That maximum pressure is worth knowing precisely, since Weihrauch is clear that going over it isn’t just unnecessary, it risks personal injury.

What’s The Maximum Fill Pressure For The HW 100 X?

The HW 100 X takes a fill of up to 250 bar. Never exceed this, filling, using or storing the cylinder above this pressure carries a genuine injury risk.

That’s separate from the seal damage that comes specifically from filling too quickly, which is why fill pressure and fill speed both matter.

If your fill setup runs at 300 bar, you’ll need a regulator set down to 250 bar rather than filling straight from the tank.

Can I Take The Air Cylinder Off To Fill It Separately?

Yes, the cylinder is designed to be removed. You can fill it away from the rifle if that suits your setup better, or keep a spare cylinder charged and ready to swap in.

With filling covered, let’s move on to what you’ll be doing every time you head out to shoot, loading and cocking the rifle itself.

How Do I Load The Magazine?

Load pellets into the magazine one at a time, seating each one flush so it sits properly in its chamber.

Once loaded, slide the magazine into the receiver until the securing slide locks it in place. Always check the magazine is seated correctly before you cock the rifle.

How Do I Cock The HW 100 X?

The HW 100 X uses a side lever action. Pull the cocking lever back fully in one smooth motion, this cocks the action and opens it up. With the magazine loaded and seated, return the lever to the closed position, which is what actually feeds a pellet from the magazine into the barrel and readies the rifle to fire.

Keep the rifle pointed in a safe direction throughout.

What Calibre Does The HW 100 X Come In?

The HW 100 X is manufactured in .177 (4.5mm), .20 (5.0mm) and .22 (5.5mm).

Even with everything set up correctly, it’s normal to run into the odd hiccup early on, so here’s how to work through the most common ones.

Why Won’t My Rifle Fire, Is It Out Of Air?

If the rifle isn’t firing or shots feel weak, check the manometer gauge on the cylinder first, since a low fill is the most common cause. It sounds obvious, but it’s worth ruling out before you assume anything more serious is going on.

Also double check the magazine is seated properly and that the safety lever isn’t still engaged, since either of those will stop the rifle firing even with a full cylinder.

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

Don’t load another pellet on top of it, that’s the main thing to avoid. Instead, fit an empty magazine, cock the rifle, and fire it in a safe direction at a proper backstop, this alone clears it in most cases.

If that doesn’t work, open the cocking lever, remove the magazine, and use a proper cleaning rod to push the stuck pellet from the muzzle end back towards the breech, where it can be removed through the open action.

If more than one pellet has stacked up in the barrel, stop and take the rifle to a gunsmith rather than continuing to push rods through it, since forcing it can damage the rifling.

How Do I Know When It’s Time To Refill?

Keep an eye on the manometer gauge on the cylinder as you shoot.

Shooting on too low a fill isn’t just an accuracy issue, Weihrauch specifically warns that insufficient pressure can cause a pellet to stick in the barrel, which is a genuinely dangerous situation since it can make the rifle seem unloaded when it isn’t. Top up well before the gauge gets low rather than trying to run it right down.

Any Tips For Better Accuracy With The HW 100 X?

Rest the front stock on a sandbag or similar soft support rather than resting the barrel or cocking lever directly on anything hard, and support the rifle with your hand rather than letting it sit rigidly on a surface. Mount your scope so your eye sits roughly 5.5 to 7.5cm back from it for a clean, consistent sight picture. Take up the trigger smoothly through the pressure point rather than snatching at it, and hold your aim on target for a second or two after the shot breaks rather than dropping it immediately.

Different pellets shoot differently out of the same rifle, so it’s worth trying a few types to see what your particular HW 100 X likes, heavier, good quality diabolo pellets tend to perform best.

Between sessions, there’s a bit of upkeep worth building into your routine, particularly if the rifle’s going to sit unused for a while.

How Often Should I Empty And Dry The Cylinder?

Vent the air cylinder down using the air venting tap roughly every 20 fills, or if the rifle is going to sit unused for four weeks or more.

This takes the strain off the seals during storage and lets any trapped moisture escape, which helps the rifle stay consistent when you bring it back into use.

How Do I Clean And Store The HW 100 X?

Always make sure the rifle is unloaded and decocked before cleaning. Wipe down the exterior and stock with a dry or lightly oiled cloth.

Store the rifle somewhere dry, ideally with the cylinder vented if it’s going to sit unused for a while, and keep it out of reach of children.

Once you’ve got the fill and load routine sorted, the HW 100 X settles into being one of the more dependable PCP rifles out there, consistent shot after shot with minimal fuss.