Short Stroking

[tomburras 2,730]

Hi all

 

I'm looking at doing a strip, polish and fit in a drop in kit on an old hw soon. I was wondering about short stroking it too. Has anyone done or had this done to one of your springers and was it an improvement? Any advice would be apriciated!

[jonnie bravo 572]

What model?

[tomburras 2,730]

Hi jonnie, it's a HW80mk1

[tomburras 2,730]

Sorry I ment to type hw85.

[mark williams 7,561]

Tom, would you consider shooting classic with your mk1 ?

They are a tremendous classic along with the FWB Sports and what a "sharpening to marksmanship" you`ll get .

 

atb

[Rez 4,961]

Get a gas ram. Same difference

[tomburras 2,730]

Tom, would you consider shooting classic with your mk1 ?

They are a tremendous classic along with the FWB Sports and what a "sharpening to marksmanship" you`ll get .

 

atb

Hi mark I ment hw85 not oops i said wrong gun first!

 

Yes when reading your post on your fwb sport I am considering it!

 

When I hold it and look at it I get a warm feeling as I had a hw85 mk1 in my early teens and used to spend endless hours pinking and hunting with it - the memories came flooding back! I have even been sniffing it ha ha!

 

I might open it up and have a look inside and see if it's a cut spring in it and how the piston seal looks and have a think and consider keeping it original. Iv not had chance to take it out yet but over the chrono it's very consistent.

[tomburras 2,730]

Get a gas ram. Same difference

Iv had had all sorts ov ideas going through my head but I am now thinking of keeping it original like mark has with his fwb sport.

 

Would still like to hear more info on short stroking tho I'm interested but can't find much info!

[tomburras 2,730]

This hw85 is like a smaller hw80. Bloody lovely thing. Smaller and lighter but still built like a tank! It is stamped made in west germany so made before the Berlin Wall was knocked down?

[Rez 4,961]

Don't know much about the science mate which is what it is really. From what I do know, it's all about lock time... Hence my gas ram comment... to get the locktime faster, you decrease the swept volume within the piston (short stroke) and use the faster more powerful spring. Bring on the Ox

 

Not all rifles benefit from short stroking... only the ones generally built to run with much higher power output really benefit.

 

Tom. Do it. Let us all know. Your the only one that can lead the way.

[tomburras 2,730]

Cheers Rez! I thought that was the principle behind it. I will look deeper into it and have a think. I'm loving the lock time on the 99 and was trying to have that characteristic on an old HW and have the best of both worlds.

[jonnie bravo 572]

I'm not sure about the faster lock time thing to be honest. A faster spring can just cause more recoil.

 

Short stroking is about getting the optimum swept volume, hence why I bought a 99 as it's the closest thing to ideal for uk standards.

 

I know tbt is doing short stroke drop in kits, they might be worth a look, you could probably get a bespoke kit for the 85. I've seen one 85 before it looked awesome

[tomburras 2,730]

Thank you jonnie iv been in touch with tbt and the HW95 kit will fit with a bit of fettling as they called it. I might order a kit and have a play soon.

[threelander 81]

the mk1 85 has a massive 95mm stroke and hard to tame

[tomburras 2,730]

Cheers threelander I'm thinking about just fitting the short stroke kit straight away. Using it like that for a while and having a spare spring full lentgh for a non short stroked set up too.