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 The Machinist's HW 77 k 
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Unread post The Machinist's HW 77 k
Hi all.

I hope this thread will turn out to be a complete guide on how to re-engineer a rifle from a completly worn out rifle action into something a bit special. I have decided to write it here as i think it could be a touch more specialised rather than other airgun forums and i'll also get better feed back i feel from people who know what there talking about.

Ok for a start i'm a think outside the box type and i intend to come up with a few things that you have probably never heard of before. Airgun tuners beware as i'd really like your feed back here on what you think of my ideas.

So say Hi to Donna, which is short or more apt for The Donor !

Image

Donna is about 1985 ish i'd guess with serial 1010156, .177 calibre and is seen here fitted with a skinny TH stock and SR6 HFT scope.

Stripping the rifle down revealed that the rifle had been tuned in the past to a medium level i suspect, feel free to input on this, what this level of tune is?

Image

As you can see, the rifle is almost fully stripped back to the bare metal and ready for a reblue.

The rear edge of the compression chamber, again this has been chamfered and radiused by a gunsmith in the past, as i think as standard they have a 90 deg sharp edge ?

Image

Is this a standard piston head ?

Image

Also the piston has been sleeved at some point with a steel sheet of shim.

The stock for this rifle is aweful so i'll be needing something standard ish for the time being until i can get something a touch better but obviously inline with HFT rules so no chunky stocks i'm afraid.

Watch this space and feel free to advise and input your ideas.


Sun May 01, 2011 7:30 pm
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Unread post Re: The Machinist's HW 77 k
Nice project you have there, have a look in the gallery for "Sow's ear" and you'll see a really tired example of a HW77K. She truly is a silk purse now and i look forward to your's doing the same. :D
P.S
There's also "Silk purse" which is how she looks at the moment.

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Mon May 02, 2011 5:27 am
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Unread post Re: The Machinist's HW 77 k
That piston seal is a standard HW item. Also, the green rear guide you have pictured is identical to one I have that was a Chambers Ultra guide. It's possibly been fitted with a Chambers tuning kit. I'll look forward to watching the progerss of this, as it's the kind of job I enjoy too. Have fun with it. ;)

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Mon May 02, 2011 7:24 am
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Unread post Re: The Machinist's HW 77 k
AFter spending hours and hours polishing this action i'm wondering whether to have it blue'd at all and leave it "Naked" and wondering whether to leave it polished, it looks fairly cool actually. Especially considering my finances at the moment with being out of a job etc. :/ ha that could be my new Forum handle "The Naked Gun"
HAHA like it !

I've also seen others with a polished action so i'm wondering what is used to protect the gun metal from rust etc ? i dont mind polishing it to keep ontop of it seen as its my one and only gun. what say you guys ?


Sat May 14, 2011 10:11 am
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Unread post Re: The Machinist's HW 77 k
Nice to see this project. I'm looking forward to your progress.

The piston seal is identical to the ones I took out of my new HW97KT and HW30S. They may be original or someone has exchanged the original seal with a newer factory one (being surplus after tuning with a new seal)?

As to the rust/bare metal issue, have you thought about nickel-plating it? For 40-60 euro's you can buy so-called 'brush plating kits' on ebay. They are sold buy an UK company called Gateros Plating (http://www.gaterosplating.co.uk/). On their site you will also find links to Youtube example video's I think. I am comtemplating gold-plating some of the parts of my HW97KT myself (to add a personal bling-bling factor).

Cheers,
Albert.


Sat May 14, 2011 10:42 am
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Unread post Re: The Machinist's HW 77 k
Thanks Albert. And thanks for the info !

I'm having to rush things a bit now, it would have been great if i'd have had another rifle to shoot while i was restoring this one but unfortunatly this is my one and only rifle, and i have a very itchy finger so want to get out there shooting.

I have thought about replacing the barrel with something like an ANshutz Match Barrel or a Lothar Walther item, turning the barrel to a half of a degree taper over a couple of inches and machining out the breech block at exactly the same angle for a perfect taper fit, then heating up the breech block and swaging the barrel into position followed by CMM inspection for absolute straightness to within microns. What do you think ?

It should be noted taht the barrel on this rifle has been hacked down from its original K size whatever that was to just 11" inches or 300mm, which i suspect has chopped out the "Choke" so i feel that will effect the accuracy of the rifle over ranges longer than say 25 metres ? what do you guys think ?


Sat May 14, 2011 11:12 am
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Unread post Re: The Machinist's HW 77 k
I was told by a very respected airgun tuner that removing the choke has little or no effect on accuracy, where i think it's more important is with making barrels less pellet fussy, as long as the crown has been finished properly and square then i think that's more important. Try it out first before you go to the trouble and expense of replacing the barrel. :D

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Sat May 14, 2011 2:50 pm
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Unread post Re: The Machinist's HW 77 k
I agree with what Darth says about the barrel, I've got a cut down HW80 barrel that still gives nice tight groups at 55 yards.
Paul.

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Sat May 14, 2011 6:56 pm
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Unread post Re: The Machinist's HW 77 k
Darth james wrote:
I was told by a very respected airgun tuner that removing the choke has little or no effect on accuracy, where i think it's more important is with making barrels less pellet fussy, as long as the crown has been finished properly and square then i think that's more important. Try it out first before you go to the trouble and expense of replacing the barrel. :D


Thats nice to know Paul. Yes i'll be experimenting of course, i also thought it would definitly be "different" sporting a nice chunky Anschutz Match Barrel. I will see how it goes but one for the future maybe, and the engineer in me wants a go at barrel replacement anyway, but i'll make do for now with what i have. ;)

I have also managed to find a fellow engineer from the dreaded BBS just before i got my write priviledges removed who has kindly offered to make me a muzzle brake within the budget of the weekly dole ! so thats fantastic.
I have also applied for job thats local, so i should be back on the beloved machines within a few weeks hopefully. So i should be able to start doing a few bits.


Sun May 15, 2011 4:57 am
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Unread post Re: The Machinist's HW 77 k
Anschutz barrel eh? I thought you said you were trying to keep costs down??? :? :? :?

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Sun May 15, 2011 8:44 am
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Unread post Re: The Machinist's HW 77 k
I am at the moment but thats One for the future Litehammer, the future.....obvioulsy at the moment i find mysel in a position where i cant do anything but when i get something sorted i'll find myself in a position where i can do everything.


Sun May 15, 2011 9:27 am
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Unread post Re: The Machinist's HW 77 k
The Machinist wrote:
When i get something sorted i'll find myself in a position where i can do everything.



Oh!, I do wish you luck with that one. ;)

:lol: :lol: :lol: :lol: :lol: :lol: :lol:

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Sun May 15, 2011 11:44 am
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Unread post Re: The Machinist's HW 77 k
I'm sure there was a tuner in the mid 80s, Airmasters maybe, who fitted Anschutz barrels to their top level tuned 77s. I'm pretty sure also that the early Theoben Sirocco gas rams were equipped with Anschutz barrels.

It's a nice idea, but I'm not sure the gains would be worth the expense. A good HW barrel will match the top end FT rifles at 55 yds. My HW100 .177 is as accurate as my Steyr LG100, and I've shot sub half inch groups at 55yds with my 97K when it was factory standard. I have read somewhere also that Anschutz barrels are pellet fussy but I don't know how true that is.


Sun May 15, 2011 12:12 pm
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Unread post Re: The Machinist's HW 77 k
uk litehammer wrote:


Oh!, I do wish you luck with that one. ;)

:lol: :lol: :lol: :lol: :lol: :lol: :lol:


It wont be long before your eating those words.


Sun May 15, 2011 1:04 pm
Unread post Re: The Machinist's HW 77 k
Adam77K wrote:
I'm sure there was a tuner in the mid 80s, Airmasters maybe, who fitted Anschutz barrels to their top level tuned 77s. I'm pretty sure also that the early Theoben Sirocco gas rams were equipped with Anschutz barrels.

It's a nice idea, but I'm not sure the gains would be worth the expense. A good HW barrel will match the top end FT rifles at 55 yds. My HW100 .177 is as accurate as my Steyr LG100, and I've shot sub half inch groups at 55yds with my 97K when it was factory standard. I have read somewhere also that Anschutz barrels are pellet fussy but I don't know how true that is.


Neither am i, but confidence is everything, and i'm not sure i have confidence in a barrel that has been butchered. But like Paul mentioned earlier only a good test will do. which is something i havent had the chance to do yet.

You are correct the early theoben sirroco's had an anschutz barrel, i know because i once owned one :silent:

I'm not sure whether a Weirauch barrel can take a good butchering and still maintain its accuracy but it sounds like one will, where as i know for a fact that some other barrels wont.


Sun May 15, 2011 1:16 pm
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