I owned a thumbhole full sized version of the HW 100 T for about 18 months. A really nice and well made (possibly not) gun but quite heavy to shoot offhand although not impossible. Accuracy was phenomenal with pellet on pellet at 25 yards. Not especially fussy about pellets either. It was happy with anything from H&N, Bisley, JSB or RWS. Then one day at around 18 months old it did not seem to be quite as accurate and I had no explanation for it. After a week it could not reliably put two pellets in the same quarter of the target, which now looked more like it had been hit with a sawn off shotgun. I had shot for for a minimum of 4 hours every week with this gun over the whole 18 months and it had never missed a beat.
I asked a gunsmith to look at the HW 100 and he told me that the Weihrauch moderator was bent and knocking the pellets off line. He recommended a replacement silencer from Huggett. I bought one and when it was fitted it made no difference. Exit one gunsmith. I found a real gunsmith who looked at the gun and found the issue. Between the magazine and the barrel is a transfer port for the pellet and it has a small gap of a few millimetres. When the gun was new the pellets would slide across the gap without a problem. As the gun became well used, the pellets slipped a little in the transfer port and were not entering the barrel completely co-axially (straight) and therein lay the problem. A temporary fix was made but the gun was never able to shoot pellet on pellet again and I was unwilling to spend several hundred pounds on having a custom part made and fitted.
My view of the gun is that it was brilliant. It was accurate and could be relied upon to hit targets out to 50 yards. I suspect that some cost cutting had taken place and that had affected its longevity. Some other owners may have taken much longer than 18 months to wear it out but I was shooting for about four hours every week. My gun was bought through an RFD who did not use Hull Cartridge so it was a grey import and Hull Cartridge (quite rightly in my view) could not help me. I have attached some images to demonstrate the problem.
Before the problem:
pic1 - 5 pellets (pellet on pellet) at 25 yards -
pic2 10 pellets ( group of around 8mm) at 25 yards
Problem:
pic 3 - 10 pellets at 25 yards! Not possible to predict point of impact.
pic 4 - after new Huggett silencer fitted - no accuracy or predictable point of impact.
Temporary repair by gunsmith:
pic 5 - 5 shots at 25 yards in a scattered group covering about 1 centimetre.
pic 6 - 25 yard target shot with 5.25 foot pound ten metre rifle with aperture sight.
The scope I had fitted was the Hawke Airmax 30 SF 4-16 x 50. It was a really nice scope and I loved the extended sunshade that kept the sun out of the line of sight when shooting at targets into the sun on bright days. The addition of flip up covers was welcome. What I have found is that high magnifications tend to magnify mistakes in stability and aim point. I would now recommend a much smaller magnification and the best build quality you can afford, depending on your shooting needs. Not for nothing do Leica, Zeiss & Schmidt & Bender cost the arms and legs that are asked for them. Try looking through a 1.1 - 6x Zeiss scope to see what I mean. (£1300 or thereabouts!!!)
For what it is worth, the gunsmith who had repaired the Weihrauch for me was a mechanical engineer who had worked some 50 years as a gunsmith. He thought that the HW 100 was badly designed at the pellet transfer port. He analysed the issues over several weeks and had written to Weihrauch to try and get them to understand his findings. Sadly, they did not want to know.
edit:
Davev8 mentioned the shot count as being quite low. I suspect he may have been referring to the carbine model. The full sized model regularly gave me about 120 shots on a 190bar fill.
One incidental point of interest is that the pellets used in the last image with the ten metre rifle were RWS R10 Match 8.2g 4.50 in size.
Hope this helps.
[attachment]Pic 7.jpg[/attachment][attachment]Pic 7.jpg[/attachment]