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HW80 |
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2615 |
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Topic: HW80Posted: 15 Oct 2025 at 1:09pm |
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I looked at hw80 exploded diagram. It runs the same set up as the hw97.
The metal spring going into the metal piston, metal on metal. We all know how ringy metal on metal is. It has the whole spring tube to fire sound back down. Its an echo chamber for spring resonation. Put your phone, speaker first, into a cup, put on some sounds you'll see what I mean. Tbt kit with a bottom guide and slip washer stop that metal on metal and allow the spring to turn as its cocked or fired. Guides are tighter too. No extra power no loss of accuracy but quieter, and a hell of a lot smoother cycle. I'll be using kits from now on. |
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2615 |
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Posted: 15 Oct 2025 at 12:35pm |
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I got tbt kit.
They just run smoother and quieter. The bottom guide and slip washer make a difference and the tolerance of the guides is way tighter inside the spring. Looking at the hw80 exploded view its the same as the hw97, the metal spring pushes into the metal piston an sits metal to metal. Like have a amplifier for the spring resonation. There are 25mm and 26mm pistons for weihrauch depending on the year, so if you go kit be aware of that. You can find the online what years and models ran what piston. I wont go back to standard set up. ( Unless spring breaks, then the replacement weihrauch spring I got as a replacement spring for orginal spring which broke will go in till get another kit) I have nothing bad to say about the kit. Arrived way fast too. |
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JasonEdward
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Joined: 22 Sep 2024 Location: Waihi Status: Offline Posts: 186 |
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Posted: 15 Oct 2025 at 11:05am |
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I have an old well used HW80 .22 that I believe performs approximately to spec at 17.42 foot pounds on H&N FTTs at 14.66 gr leaving the muzzle at 732 fps.
I have not yet fitted the .177 barrel I have but that could be interesting... It is the most noisy twangy rifle I have ever used but it shoots straighter than most. Diana Model 52 .177 at 16.67 foot pounds on H&N Barracuda 10.65 gr 840 fps, for example has similar recoil but much less twang - the HW lets your ears know there is heavy stuff moving inside it when you shoot it. I'm not sure there is much difference at all with recoil/feel between the two but the sound from the HW may be making me feel and think it has more recoil...but I think that could be my subjective impression based on what my ears tell me. My general understanding is tuning reduces that twang but has minimum effect on accuracy. Except an expert can tune better than that but unless you get lucky, expertise is required. Consensus seems to be they are great rifles - and I agree - but a little over-cooked in power so not quite as accurate as other HWs. |
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grbaker5
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Joined: 16 Sep 2021 Location: Te Horo Status: Offline Posts: 11 |
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Posted: 04 Nov 2022 at 6:09am |
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I would definately remove the old grease and then Moly grease the spring... not heaps but enough to allow smooth metal on metal contact. Just some thoughts... the twang sound is generated right next to you ear when firing. If you stand away from the rifle (have someone else fire it) it isn't that loud... I have found springs quiter than thump of nitro-pistons but that may be subjective. If it makes a twack sound the spring is broken... so twang is good. ![]() Vortex and other make after-market nylon spring guide kits, including HW80s. I have one to fit to my TX200 but I haven't bothered since its twang doesn't scare the bunnies. http://vortekproducts.com/ourstore/index.php?route=common/home Obviously they ship to NZ but not sure wehat that would cost presently.
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kruzaroad
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Posted: 04 Nov 2022 at 2:57am |
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If I've ever heard an excuse for a beer, that's got to be it.
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dvlnme
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Joined: 31 May 2017 Location: taranaki Status: Offline Posts: 519 |
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Posted: 04 Nov 2022 at 1:59am |
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its generaly accepted in UK that it only takes 6fpe from small 177 pellet to cleanly kill rabbits with a head shot,the main advanages of higher velocitys are higher fpe/flatter trajectorys/shorter flight time and capability to use heavier pellets at decent velocitys,the advantage of heavier pellets is tho velocity maybe lower than lighter pellets they hold that velocity for longer and tend to shoot flatter for longer distances than lighter pellets so hold more energy for longer as well and tend not to be as affected by wind as much lighter pellets,in the end it all comes down to the most accurate pellet for the rifle or pistol, learning its trajectory out to the max distance you are most likely to shoot it out to,and then put a lot practice into learning how to shoot it over a range of distances out to that max distance,its really all about learning your rifle and what its capable of,the kill area of a rabbit/hares head is approx 25mm in diameter for a brain kill shot,i use twist caps of my beer bottles for practice hunting targets,because they are easy to see and reacte when hit i place them at radom distances out to100m,when i can no longer consistantly hit these 27mm targets thats the max distance i use that gun for hunting,i find this works better for me than paper targets because i dont need to check targets to know when i hit them and they lot more fun to shoot at than paper eh.
cheers mike
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flock
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Joined: 28 Jan 2022 Location: Christchurch Status: Offline Posts: 112 |
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Posted: 01 Nov 2022 at 11:16am |
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Thanks for the offer, JSBs are doing fine. 3 shots threw each other at 25 yards.
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kruzaroad
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Posted: 01 Nov 2022 at 10:36am |
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It still has around 5fpe @ 128m.
you want me sort out 20 AA field 16gr pellets and send them to you for trial. save buying a tin |
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kruzaroad
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Posted: 01 Nov 2022 at 10:29am |
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I ran 14.3gr round nose deablo through gun chair at 750 ftps
Here's the graph. Thats enough to bowl a hare over at 100yards, 91.44m.
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flock
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Joined: 28 Jan 2022 Location: Christchurch Status: Offline Posts: 112 |
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Posted: 01 Nov 2022 at 9:43am |
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only spitting the 14g at 750
Edited by flock - 01 Nov 2022 at 9:46am |
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