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Weihrauch HW100S

Weihrauch HW100S

When the first variant of the Weihrauch HW100 PCP was launched in the UK it caused quite a few raised eyebrows. Initially the rifle only came in one stock variant, could only be filled by detaching the air reservoir and surprised us all by its then ‘un-traditional’ side-lever cocking mechanism. Well things have certainly moved on as many other rifles now use this cocking arrangement and without a doubt the HW100 helped the UK shooters accept the side-lever for priming and transferring the pellet into the barrel.

Models are designated ‘100T’ or ‘100S’, both having carbine size counterparts but it’s the letters in the name that denote the two stock types. The full length sporter here on test being the ‘S’ version while the target thumbhole stock obviously being given a ‘T.’

Good Wood

The walnut Bavarian style stock is quite substantial with a well-defined angular cheekpiece and full rubber butt pad. The pistol grip, though having a slim neck, is quite chunky and fist filling yet has been deeply scalloped on the right for the heel of the shooting hand, allowing a very comfortable hold.

The well-cut chequering consists of four panels set either side of the grip in two sections, the theme being carried forward to the forend. However, it’s practical as well as attractive, aiding grip in wet conditions or when wearing gloves. Maple spacers are now found at the rosewood pistol grip end cap and the rubber butt pad.

The forend has changed from the original sporter as it’s now got a much deeper, flat-sided rounded underside profile, finishing in a relatively stark angular tip. This combination of chunky rear section with an almost target style forend combine to allow the rifle to feel very solid in the shoulder and on aim.

Independent Air

The air reservoir is still detachable but now due to a quick fill point at the front can be filled on or off the rifle. The recommended fill of 200bar gives 120+ full power shots in .22 calibre and approximately 110 on the .177 calibre rifle here on test.

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The air gauge or ‘manometer’ as Weihrauch term it sits on the very end of the air reservoir and
it’s recommended when the needle drops into the yellow at 90-bar that it’s time for a fill so the self-regulating knock open valve can work to its optimum performance.

As well as rifle, silencer and air reservoir, the full package now includes brass fill adaptor, brass cover for the air reservoir to protect threads and prevent leakage during ‘off rifle transportation’ and two 14-shot magazines. However, there is a little optional extra that will be very interesting to HFT participants – a competition this rifle just begs to take part in. This is an optional single-shot clip. This simply slips into the action in place of the magazine for those who prefer to feed in the ammo shot for shot. Once in situ, and a pellet is fired, pulling back the cocking lever allows the ‘clip’ to spring out to the right to be loaded with another pellet rather than the cocking process indexing a magazine around to the next station. The clip can then be pushed back into the action. Return the side-lever to its forward original position and you’ve another pellet loaded.

When using the fourteen shot magazine, you need to fill it with pellets before loading into the rifle. This is accomplished by first cocking the action by pulling the side-lever fully rearward; you then slide back the magazine retaining catch (which also secures the auto-load single shot clip when used) found on the right of the action block just behind the magazine/clip housing; the magazine can then be lifted from the action. All fourteen chambers of the magazine are then filled with pellets and then replace the magazine into the action (the magazine retaining catch will lock on automatically) and return the side-lever to seat a pellet into the barrel. One of the great things about the Weihrauch magazine is that the system will not allow you to load two pellets into the barrel at once – something that many of us have done by mistake with other multi-shot air rifles. 

The HW100S uses a 16.5-inch Weihrauch made barrel. Top quality and super strong it’s semi-floating for accuracy and is guided up along the air reservoir to be held and secured at the front by a barrel band. The band has a synthetic O - ring that protects the barrel from knocks, adds extra strength but doesn’t effect the semi-floating nature, therefore accuracy is kept to the highest possible level. On the new HW100 it will be noted the barrel is now threaded at the muzzle to accept a standard ½” UNF screw on silencer. You can fit a ‘can’ of your own choosing but the new Weihrauch ‘High Efficiency Silencer’ has proven to really live up to its name.

The rifle’s 2-stage fully adjustable match grade trigger mechanism with manual safety is a superb unit. The original polished alloy trigger blade has now been replaced with a black anodised one but is still ergonomically curved allowing a very comfortable ‘finger fit.’
The manual, re-settable trigger safety lever operates very positively and is positioned on the right and at the rear of the action block. Push forward and you put the rifle into live fire mode indicated by a red dot clearly visible on the action block. Pulling it back puts the rifle on safe, whereupon you can clearly see a white dot on the action. Incidentally, the safety can only be operated and indeed only functions when the rifle is primed.

Accuracy Assured

The lengthy action block is sensibly machined with lengthy scope rails so fitting optics is a doddle. There’s no problems fitting long scopes or big objective models as long as you use the correct mounts. For test I fitted a Hawke 6 – 24 X 50AO IR SR12 IR Nite-Eye and after zeroing at 30yds, upon squeezing off the first few shots from the HW100 I was again impressed with the whole ‘experience’ shooting a rifle of this class offers. This time around I did notice that the handling was absolutely rock solid - though it felt quite hefty with the extra weight of the large scope and silencer onboard. At 30yds shooting bench rested, the HW100S will produce the much sought after one-hole groups. It isn’t pellet fussy and most quality brands will give results that far outshoot the shooter…

This is an absolutely stunning air rifle – no question about that - and the overall feel and performance of the HW100S is remarkable.

£822 including silencer, two magazines and filling adaptor

Auto Load Single-Shot Pellet Clip £33.50

  • Weihrauch HW100S - image {image:count}

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  • Weihrauch HW100S - image {image:count}

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  • Weihrauch HW100S - image {image:count}

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  • Weihrauch HW100S - image {image:count}

    click on image to enlarge

  • Weihrauch HW100S - image {image:count}

    click on image to enlarge

  • Weihrauch HW100S - image {image:count}

    click on image to enlarge

  • Weihrauch HW100S - image {image:count}

    click on image to enlarge

  • Weihrauch HW100S - image {image:count}

    click on image to enlarge


  • Model: Weihrauch HW100S
  • Type: Side-Lever action PCP
  • Optional Conversion: Multi-Shot or Single-Shot
  • Calibre: .177 on test, .22 available
  • Stock: Walnut Bavarian sporter
  • Sights: N
  • Grooved for scope mounting: Y
  • Barrel: 16.5”
  • Overall length: 41.75”
  • Weight: 8.6lbs
  • Energy: 11.7ft/lbs


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  • Well I’ve (today) just bought a 100S Laminate .177- so the "full length" version, but with the fancier stock. Half a charge = 4 magazines or 56 shots.

    Smooth as you like and it’s accuracy is outstanding - 1/2" one hole group at 30 yards and I’d never used the gun before .....

    My only concern is whether it’s going to have enough punch to kill the vermin in my garden (mostly pigeons), but I suppose if it’s even more accurate in practice - it’ll be head shots all the way.

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    Mark L
    30 May 2017 at 09:33 PM
  • Decided on the .22 in the end, hope its the right choice. Have noticed some stock movement any ideas how to stop this? Shooting range tomorrow to zero in at 30 yds.

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    S Burfield
    25 Aug 2016 at 10:17 PM
  • I must admit I've always preferred carbines over rifles, as they're just so handy, especially with a moderator fitted. A rifle plus moderator seems very long and a carbine will weigh less too. It's all down to personal choice of course, so a visit to a gunshop to compare the two should settle it for you.

    As for calibre, both .177 and .22 will do the job, so once again it's just down to the individual but I tend to use .177, as the flatter trajectory allows you to aim 'dead on' for a great range of distances.

    Let us know what you decide.

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    Troll Hunter
    24 Aug 2016 at 06:14 PM
  • Which hw 100 s would you advise for mainly rabbiting and ratting, the standard, or carbone version. Also which calibre. Many thanks.

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    S Burfield
    20 Aug 2016 at 09:18 AM
  • Have a brand new .177 HW100SK and once zeroed on a bench rest it will put 14 shots virtually through the same hole at 35 yards. Best gun i have ever owned

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    04 Mar 2016 at 11:18 PM
  • This sounds like a magazine problem to me, try another mag and see if it still happens- I doubt it will. Maybe the holes in the magazine aren't quite right and the pellets are being damaged as the probe pushes the pellets into the barrel.

    Give it a go and let us know how you get on.

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    Troll Hunter
    04 Dec 2015 at 05:55 PM
  • I purchased a brand new hw 100 from boxed and scope , loaded up my 14 pellet mag, and away I went, what a shock. 11 perfect bulls and then the rest spread like a shot gun. tried again 10 shots the rest spreaders. tried other pellets but the same thing. one or two spreaders. not good enough for bench shooting .i was firing against three other hw 100s . what a let down. whats happening??? even the others could not understand what was happening. any comments.

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    04 Dec 2015 at 03:39 PM
  • Hi all,just bought a 100s s/h in mint condition.Its only had about half a 500 tin of .22 falcons through it! First test was to crono it till 90bar indicated from 200bar.This is what i got :- First mag,first shot 595 FPS. Continuing through to 10 mag after 126th shot and showing 110bar.Finished after 11 th mag showing 90bar.So after 154 shots the last of which recorded 581FPS,the lowest,and the highest throughout at 598FPS gives a velocity spread of 17FPS. WOW! Who needs a regulator with this consistency! The rifle is a joy to shoot,so smooth,so accurate. So i believe the German saying :- Vorsprung durch technik, applies! cheers all and happy shooting.

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    Jim Wise
    04 Nov 2013 at 11:10 PM
  • just got hw100 sport this gun is top quality ,tried rsw pellets at 40 yards grouping pants,air arm,45/50 yards hitting target every shot

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    24 Dec 2011 at 12:22 PM
  • Nice review. I have the HW100S in .22 + Hawke Nite-Eye 3-12 x 50 A0.
    Last air rifle I owned some years ago was a HW80 springer, so how things have progressed.

    I would say the accuracy is 'single-hole' at 30yards bench-rest on a windless day, but you only get a predictable 45-50 consistent shots in .22, before the pellets drop off, a bit before going into the 'yellow' on my instance. So if you want to shoot a lot, then maybe AA's are better in that respect. PS. What is the point in the massive 'red' zone on the pressure gauge needed for if?

    RWS Superdomes are quite good, but only up to 30 yards or so. I'm looking for a (the most) stable longer-range pellet as I write this, so any recommendations welcome.

    If you want to spend a day on the range shooting 100's of shots, get a big dive bottle; don't do what I did and get a hand-pump. You will quickly learn to hate it - all that effort for 50 shots and you won't have a steady aim after all that work - no way! Plus you look like a tit.

    A 1/4 MOA scope is ok, but if my quick calculations are ok, 1 click of 1/4 MOA at 30 yards is 0.085 inches or 2.159mm (?? I might well be wrong. Sorry if I am). But if you are a perfectionist like me, a 1/8th MOA scope would be better. At 1/4 MOA 35 yards I didn’t seem to be able to get the pellet dead-center, 1 click was off to either side of dead-center. It might be me, but that disappointed me (slightly) as I thought it was not unreasonable to get it smack on as this gun is clearly capable of it. I said perfectionist right..!

    I'm getting a bi-pod fitted to mine. IMHO that's fairly essential for safe long-shots (or is it just my ability).

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    31 Aug 2010 at 02:21 AM
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    30 Jul 2010 at 09:38 AM
  • best gun .177 i've ever had and i have had a fair few getting the .22 next wednesday can't wait

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    23 Jul 2010 at 08:58 PM
  • In a recent test on the HW100FSB KT by Mark Camoccio for The Sporting Airgun Handbook (Issue 3) he mentions the shroud's expansion chamber and adds;

    "... the shroud is ‘ported’, with four equidistant holes drilled to the rear; which means that excess spent air is vented back and dissipated on each shot...

    To be honest, my experience of several bull barrelled models from other manufacturers, with a similar set-up, has left me fairly unimpressed...

    ...with the FSB in the field, the blast as previously confirmed, was tamed significantly."

    He also gave the weight as 7lbs (thumbhole carbine).

    We also covered this model in a GunMart Online video which will be posted soon. We were shooting indoors so the sound-muting was pushed to the limit.

    As for comparisons with the AA S510, it really is a matter of personal choice - neither rifle is particularly heavy, both are extremely accurate, one gives a few more shots per charge of air while the other gives more shots per magazine, etc. However, both of these rifles are quality pieces of kit and neither should disappoint.

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    Pat Farey
    03 May 2010 at 11:38 AM
  • Can any one give me an objective appraisal of the latest hw100 carbine sporter stock with the Full Shrouded Barrel--it should only be a means of silent sing it ,the action etc being the same .Is it just a gimmick to keep up with the lighter AA510SL?.I have bought May's edition of Airgun world previewing it, but they only mention the shrouding in passing ! really they have probably already tested a carbine version ,so why not more on the obvious change (says has an active baffle system with felt wadding - will this need serving over time ?).For example is it lighter especially in the sporter stock version (stated 3.3 k 7.3lbs) for thumb hole tested --of great interest to me as I find my HW97K too heavy for lugging round vermin shooting. It says in the article its a match barrel of weihrauch's design-thought it was a Lother Walther unit Have asked various gun dealers and even Emailed Hull cartridge Co (no reply).Do I have to get my fluent German speaking brother in Holland to call Weihrauch direct !.Regards Bob.

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    Robert Todd
    02 May 2010 at 11:05 PM
  • The HW100 K.177 is second to none,I first looked at the .22 HW100 but everyone was saying 177 was the way to go,I went along to my local gun shop and after about two half hours came away with a HW100K and havn`t looked back,groupings at 35yrds are tight in a ten pence circle,Rabbits at 50 yrds,squirrles at 58 yrds.I use bisley magnum pellets.hears a tip for cleaning the barrel,If useing a pull through remove the barrel if you don`t you could pull the o ring out of the breach,Before removing the barrel put a punch mark next to the grub screw this will ensure that the barrel gose back in exactly the same position every time,There will be no need to re zero your scope just put a couple of mags through the barrel and you are all set to go huntting.They are so good i bought another HW100K 177 and put a yukon N.V.on it,OUTSTANDING,10/10.Another tip the insert in the gas resavior can be hard to remove when the weather turns cold so i drilled a small hole in it feed some strong cord through it put a small hole in a little bar and feed the cord through that as well and now it`s a doddle to remove it.

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    31 Aug 2009 at 07:34 PM
  • It's easy to find out how many shots you are getting per charge - simply count them. Shoot at a target at a reasonable hunting distance and when the pellets drop an unacceptable amount, then that's when you need more air in the rifle, so stop counting.

    From our other tests on the HW100 we have always achieved more than 50 shots. The following is a quote from Mark Camoccio's test on the HW100 SK.

    ".... Over the chrono, from a 200bar fill, and using Weihrauch F&T pellets, the action produced 61 shots within 17fps and a perfect power setting of 11.8ft/lbs. Add to this that the first 30 shots were all within 7fps, and consistency is clearly not an issue... "

    As a matter of interest, if the rifle had been in .22 calibre it would have given even more shots per charge.

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    Pat Farey
    11 Aug 2009 at 10:47 AM
  • I have just bought a HW100 SK .177. Can anyone tell me how many shots I should be expecting to get out of the cylinder before having to re-fill? The official site says 50 is this true? I'm thinking if this is correct to exchange it for the Airarms s510 K, what do you think? Any coments would be a big help. Thanks

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    matt carter
    11 Aug 2009 at 12:16 AM
  • Great gun I have HW100T, a lot about & never heard any complaints @ gun club. Carbine seams to shoot as good as full size. Silencer is great take it off & give it a try....loud with out it.

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    john townsend
    24 Jul 2009 at 08:12 AM
  • Nothing specific, although generally speaking both carbine and rifle have been equally accurate in our tests.

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    pat farey
    23 Jun 2009 at 02:51 PM
  • Does anyone have any idea (data would be great) on the accuracy impact of the longer barrelled HW100 vs the carbine version please?

    Default profile image
    23 Jun 2009 at 12:15 PM