N/A HW95 .20

[coastal drifter]

I have owned this HW 95 in .20 for a little while now and have run a couple tins of H&Ns through it. It has smoothed out nicely, cocks smooth. fires soft and quiet, very accurate too. Today I shot it over the chronograph just to see what the fps was. Out of 10 rounds (11.42gr) its average velocity is 736fps=13.74ft/lbs. How's that look to you fellas? seem right? if I recall correctly, it was a little hotter new.
Thanks

 

[Mycapt65]

That's a little low unless you're at a high elevation. Most shoot those pellet around 800 fps

 

[A.G.R]

It’s a little down but if it shoots well consistant go with it .. every gun is different.

 

[coastal drifter]

That's a little low unless you're at a high elevation. Most shoot those pellet around 800 fps

yeah, I think it was somewhere around there new. Just wondered if its normal to break in like this.

 

[coastal drifter]

It’s a little down but if it shoots well consistant go with it .. every gun is different.

10 shot string high 749 low 720 average 736std dev 8.8 hits a 1inch spinner every time at 25-30 yards peep sights

 

[ChuckHunter]

Cold weather will drop velocity some too!
If it was me I would get a new piston seal and do a tune up. It's well broken in after that many shots and in the last couple of years the quality of seals that HW has been producing is sub par and they burn up in short order. Vortec seals are really good for aftermarket seals and usually don't need sizing. Will break in nicely on their own!

 

[A.G.R]

Cold weather will drop velocity some too!
If it was me I would get a new piston seal and do a tune up. It's well broken in after that many shots and in the last couple of years the quality of seals that HW has been producing is sub par and they burn up in short order. Vortec seals are really good for aftermarket seals and usually don't need sizing. Will break in nicely on their own!

Spot on. while in there , a new .125 x 30 with A .300 delrin top hat will fit the guide like a glove. Factory springs are not so great. With Vac seal it should go into the 15 ft lb area.

Tuning - HW 95 Anyone using a short spring with great results… tuning thoughts and methods.

Ok, all you Hw 95 / R9 gurus ,let’s talk.. I haven’t had one in my possession to play with in 15 years .. That being said our friend Lewis told me I needed to play with one. Get to know it. We discussed the deal and he promised me not to send me a 2x4 …. 😆 what I did get was a new HW 95 K ...

www.airgunnation.com

 

[Mycapt65]

Cold weather will drop velocity some too!
If it was me I would get a new piston seal and do a tune up. It's well broken in after that many shots and in the last couple of years the quality of seals that HW has been producing is sub par and they burn up in short order. Vortec seals are really good for aftermarket seals and usually don't need sizing. Will break in nicely on their own!

It's not the seals that are bad quality. They burn up because of dieseling. The new guns typically diesel because of bad assemblers. They often use excessive lube and or cut the piston seal lips on installation.

Everything else you said is spot on. I only use Vortek piston seals. They go in shockingly tight but size themselves nicely with a little use.

 

[coastal drifter]

Great info guys, thanks so much. I've never worked on a springer but I'm fairly mechanically inclined and would enjoy the learning experience and satisfaction of the finished product. Any tips would be greatly appreciated.

 

[coastal drifter]

I recall some newer company/fella recently selling springs here, does anyone recall or have a link to them

 

[maxtrouble]

I recall some newer company/fella recently selling springs here, does anyone recall or have a link to them

This guy has some nice videos. I used his kit in my Pro Sport, very nice quality. Will give you a good idea of what goes where. My pro tip is to tape the safety in place before you start. If not, it will go schwiiiingggg - fsck and shoot across the workbench. Been there, done that!

Weihrauch HW95/98/99/50/57 Strip guide – Tinbum Tuning

www.airrifletuning.com

 

[c_m_shooter]

All the full power HW97's were coming in at 13.5 ft lbs from the factory awhile back. I would expect the HW95 to run about the same.

 

[ChuckHunter]

All the full power HW97's were coming in at 13.5 ft lbs from the factory awhile back. I would expect the HW95 to run about the same.

Interesting!
Paul Watts did my 97 back in 2008 and was a smooth 14.5fpe for a long time.
I noticed it dropping off a couple years back and decided to go with an ARH hornet kit and a Vortek seal. It's now doing just over 15fpe and just as smooth as it ever was!

 

[A.G.R]

Interesting!
Paul Watts did my 97 back in 2008 and was a smooth 14.5fpe for a long time.
I noticed it dropping off a couple years back and decided to go with an ARH hornet kit and a Vortek seal. It's now doing just over 15fpe and just as smooth as it ever was!

Paul did great work but they were not known for higher power.

 

[Star7]

1 Year old HW95L in .20 shoots 13.23 to 14.2 fpe with a number of different pellets at 45-60F and 1200 ft altitude.

A newer HW95N is doing about 1 fpe to 1,2fpe higher in similar conditions.

both (so far) unmodified. both twanging like a banjo thrown out of a second story window


Covid era and later HW have been showing compression tubes that have NOT THE LEAST VESTIGE of effort deburring the tube. I imagine the seals need replacing as delivered.

 

[coastal drifter]

This guy has some nice videos. I used his kit in my Pro Sport, very nice quality. Will give you a good idea of what goes where. My pro tip is to tape the safety in place before you start. If not, it will go schwiiiingggg - fsck and shoot across the workbench. Been there, done that!

Weihrauch HW95/98/99/50/57 Strip guide – Tinbum Tuning

www.airrifletuning.com

Thank You

 

[Mycapt65]

1 Year old HW95L in .20 shoots 13.23 to 14.2 fpe with a number of different pellets at 45-60F and 1200 ft altitude.

A newer HW95N is doing about 1 fpe to 1,2fpe higher in similar conditions.

both (so far) unmodified. both twanging like a banjo thrown out of a second story window


Covid era and later HW have been showing compression tubes that have NOT THE LEAST VESTIGE of effort deburring the tube. I imagine the seals need replacing as delivered.

They're also using welded tubing now. The weld seam is sometimes recessed, allowing compression and grease to bypass the piston seal.

 

[coastal drifter]

All the full power HW97's were coming in at 13.5 ft lbs from the factory awhile back. I would expect the HW95 to run about the same.

Despite the loss of power, it's very smooth and accurate. 13.74 ft/lbs. isn't terrible, I will keep an eye on it but in no hurry to "fix" it at the moment, I do appreciate the many members with much more knowledge and experience than me so I can prepare for the inevitable service to my beloved HW95N .20.

 

[Star7]

They're also using welded tubing now. The weld seam is sometimes recessed, allowing compression and grease to bypass the piston seal.

View attachment 544386

That weld seam blows my mind. This situation has really gone over the top.

Good photo of a dreadful situation!

 

[Mycapt65]

That weld seam blows my mind. This situation has really gone over the top.

Good photo of a dreadful situation!

Yup. That tube gives me the willy's. Proper cylinder sealing was everything back when I built race engines. Even as a high end automotive tech, good cylinder sealing was important.