HW/Weihrauch Hw77 Mk1 done today.

[Mycapt65]

I finally got to work on my NTM Hw77 Mk1 today. It was a little bit of bear getting the receiver apart. And a giant PITA getting it back together.

I did the usual clean out. I slugged the barrel and replaced the crumbly breech seal while it was completely apart.

I replaced the piston seal with a 25mm Vortek piece. Replaced the factory spring and guide with the newest Vortek delrin HO kit. This kit has alot more preload than I'm used to and I almost needed a spring compressor to get it back together. That was part of the PITA. The other part was getting the gun fully screwed together. This was the tightest one I've had yet.

This early 77 has no beartrap so that simplified things nicely.

The trigger group was all sorts of bent and crooked. I think someone tried using it for leverage to unscrew the receiver end. There was spots of rust and grease that looked like dryed varnish. Not impressed with the triggers condition I only did a quicky on it. I soaked it in degreaser, brushed out the hardened crud, rinsed it in hot water, dried it, lubed pivots with heavy oil and greased sears and contact points with moly. I adjusted the "forbidden screw" which was actually a red slotted screw like my R8. The degreaser ate the red paint off.

I put it all together and it shoots nicely. No twang. No felt recoil. No dieseling. The chronograph says 14.4 fpe but it feels like 10. Much better power than I expected from a 25mm Hw77. It's just a tick hotter than I tuned my 177 26mm Hw97 to.

I tried accuracy testing it but the new Sightron 3-9×32 rimfire didn't last 50 shots before the reticle rotated. I'll have to find another scope. Apparently I have time. We have evil weather coming for the next few days.

I'm looking for a better Rekord trigger group of anyone has one.

That's it for today.
Be well
Ron

 

[Moog]

It's always a good feeling when you get those things put back together and got them shooting nice.

 

[Mycapt65]

I found a new 3-9x40 Airmax on the spares shelf. It's alot more porky than the Sightron but I don't have to worry about it breaking. It's a shame this happened I really liked the Sightron's weight size and fixed parallax. Plus the glass was great for it's price. It's boxed, labeled and ready to go back. We'll see what they do with this. I'll probably just put the replacement on my 17hmr.

 

[pipestone]

Patience Ron, it'll come.

Some days you step into it....... some days you don't

Dana

 

[bustachip]

View attachment 543912I finally got to work on my NTM Hw77 Mk1 today. It was a little bit of bear getting the receiver apart. And a giant PITA getting it back together.

I did the usual clean out. I slugged the barrel and replaced the crumbly breech seal while it was completely apart.
View attachment 543911
I replaced the piston seal with a 25mm Vortek piece. Replaced the factory spring and guide with the newest Vortek delrin HO kit. This kit has alot more preload than I'm used to and I almost needed a spring compressor to get it back together. That was part of the PITA. The other part was getting the gun fully screwed together. This was the tightest one I've had yet.

This early 77 has no beartrap so that simplified things nicely.
View attachment 543909
The trigger group was all sorts of bent and crooked. There was spots of rust and grease that looked like dryed varnish. Not impressed with the triggers condition I only did a quicky on it. I soaked it in degreaser, brushed out the hardened crud, rinsed it in hot water, dried it, lubed pivots with heavy oil and greased sears and contact points with moly. I adjusted the "forbidden screw" which was actually a red slotted screw like my R8. The degreaser ate the red paint off.
View attachment 543910
I put it all together and it shoots nicely. No twang. No felt recoil. No dieseling. The chronograph says 14.4 fpe but it feels like 10. Much better power than I expected from a 25mm Hw77. It's just a tick hotter than I tuned my 177 26mm Hw97 to.
View attachment 543913
I tried accuracy testing it but the new Sightron 3-9×32 rimfire didn't last 50 shots before the reticle rotated. I'll have to find another scope. Apparently I have time. We have evil weather coming for the next few days.

I'm looking for a better Rekord trigger group of anyone has one.

That's it for today.
Be well
Ron

That thing is shooting strong, I didn't realize the 25mm made that power. I've also never seen a trigger with that red screw. ARH has new rekord units for $119, that's probably more than you want to spend, but thought I would mention it in case you weren't aware.

I would think they might replace the S1, but I donno for sure. I do know years ago I had a SII bigsky scope that the reticle canted maybe 3deg.
I sent it in and they repaired it, never had anymore problems with it after that.

Nice work on the 77.

 

[r1lover]

That's a beauty. Waiting for accuracy results.

 

[Mycapt65]

That's a beauty. Waiting for accuracy results.

Me too. It'll be a few days. We have evil weather coming. It should be good. The barrel slugged well.

 

[djna]

View attachment 543912I finally got to work on my NTM Hw77 Mk1 today. It was a little bit of bear getting the receiver apart. And a giant PITA getting it back together.

I did the usual clean out. I slugged the barrel and replaced the crumbly breech seal while it was completely apart.
View attachment 543911
I replaced the piston seal with a 25mm Vortek piece. Replaced the factory spring and guide with the newest Vortek delrin HO kit. This kit has alot more preload than I'm used to and I almost needed a spring compressor to get it back together. That was part of the PITA. The other part was getting the gun fully screwed together. This was the tightest one I've had yet.

This early 77 has no beartrap so that simplified things nicely.
View attachment 543909
The trigger group was all sorts of bent and crooked. I think someone tried using it for leverage to unscrew the receiver end. There was spots of rust and grease that looked like dryed varnish. Not impressed with the triggers condition I only did a quicky on it. I soaked it in degreaser, brushed out the hardened crud, rinsed it in hot water, dried it, lubed pivots with heavy oil and greased sears and contact points with moly. I adjusted the "forbidden screw" which was actually a red slotted screw like my R8. The degreaser ate the red paint off.
View attachment 543910
I put it all together and it shoots nicely. No twang. No felt recoil. No dieseling. The chronograph says 14.4 fpe but it feels like 10. Much better power than I expected from a 25mm Hw77. It's just a tick hotter than I tuned my 177 26mm Hw97 to.
View attachment 543913
I tried accuracy testing it but the new Sightron 3-9×32 rimfire didn't last 50 shots before the reticle rotated. I'll have to find another scope. Apparently I have time. We have evil weather coming for the next few days.

I'm looking for a better Rekord trigger group of anyone has one.

That's it for today.
Be well
Ron

Nice work , Looks like you made it a smooth shooter. I love the MK1 Stock on the HW77’s better than the newer ones. I almost got a Lefty few years ago myself.

 

[MDriskill]

Wow, a beauty AND a shooter! What a lovely rifle. That's one HW I've never owned but mebbe I need to.

 

[Mycapt65]

Wow, a beauty AND a shooter! What a lovely rifle. That's one HW I've never owned but mebbe I need to.

Mike do you have a Rekord trigger housing and the two hollow rollers by any chance? I need them to fix this mangled mess.


Nevermind I found them.

 

[Mycapt65]

That's a beauty. Waiting for accuracy results.

So far accuracy has been underwhelming. It only seems to shoot FTTs well. I'm surprised that it doesn't do better with the JSB 8.44 or the better quality Rebrands like the rest of my 177 Weihrauchs.

Funny that it makes 14.3 fpe with 4.52 FTTs and 13.6 with 4.51 FTTs. Shows again small differences in pellets can greatly affect efficiency. Incidentally the 4.52s are the most accurate. Not really a surprise.

Contrary to that, the JSB 8.44 (and clones) make 14.5-14.9fpe. Between the JSB and the JSB produced FX and AA, only the AA print okay. Again most of my 177 Weihrauchs do well with these. Particular the FX and AA rebrands. Although I think I got a sleeve of small JSBs because this lot doesn't do well in most of my guns.


It does ok with the FX 10.3 (JSB 10.34). The accuracy is better than the 8.44s and still makes 14.3 fpe which is pretty impressive.

I'll keep testing. I still haven't adjusted the barrel's drift to the left. Its out by a full 1.5 rotations. I'll try another known good scope ring set up before adjusting the barrel drift. I don't like scopes dialed out that much. They start to do wonky stuff when you get close to two turns out. Especially on springers.

 

[MDriskill]

Mike do you have a Rekord trigger housing and the two hollow rollers by any chance? I need them to fix this mangled mess.

Nevermind I found them.

Sorry for the slow reply. Glad you found the bits, as I don't have any.

And may I say I'm amazed you're getting that kind of power out of this gun - that's a lotta zip for a 25mm piston.

 

[r1lover]

So far accuracy has been underwhelming.

So what exactly is "underwhelming" accuracy? Some people (okay, including me) want a single ragged hole while others are pleased to get 5 pellets into an inch circle.

And I am really surprised by the difference in muzzle energy between similar pellets. In all my years of shooting I always looked for accuracy first and last and settled for whatever muzzle energy I got. Maybe I should start looking more closely for the pellet that delivers the best of both.

 

[Mycapt65]

So what exactly is "underwhelming" accuracy? Some people (okay, including me) want a single ragged hole while others are pleased to get 5 pellets into an inch circle.

And I am really surprised by the difference in muzzle energy between similar pellets. In all my years of shooting I always looked for accuracy first and last and settled for whatever muzzle energy I got. Maybe I should start looking more closely for the pellet that delivers the best of both.

At 25 yards all my 177 Weihrauchs will put 5 completely under a nickel (edge to edge) with their regular favorite pellet an a very light breeze. Under a dime with me on a good day or with an exceptionally good fitting tin. With me on a good day, an exceptional tin in a dead calm my better 177s (95 & 97) will clover leaf at least three, usually four and occasionally all five with not much paper between cloverleaf and outlyer..

Yesterday was a good day for me and the 77 was mostly nickels and some dimes. My R8 actually did better than the 77 yesterday it was all dimes and cloverleafs. Which is odd because R8 barrel has the roughest leade I've ever seen and didn't slug well. The 77 slugged great so I expected great thing's from it. Similar to my 97. I'm not giving up on the 77 yet.

 

[beerthief]

At 25 yards all my 177 Weihrauchs will put 5 completely under a nickel (edge to edge) with their regular favorite pellet an a very light breeze. Under a dime with me on a good day or with an exceptionally good fitting tin. With me on a good day, an exceptional tin in a dead calm my better 177s (95 & 97) will clover leaf at least three, usually four and occasionally all five with not much paper between cloverleaf and outlyer..

Yesterday was a good day for me and the 77 was mostly nickels and some dimes. My R8 actually did better than the 77 yesterday it was all dimes and cloverleafs. Which is odd because R8 barrel has the roughest leade I've ever seen and didn't slug well. The 77 slugged great so I expected great thing's from it. Similar to my 97. I'm not giving up on the 77 yet.

maybe a little crown polishing ?

 

[Mycapt65]

maybe a little crown polishing ?

It's not that bad. I'm not touching the crown. For me that's a last ditch effort for bad guns. I'll do what I should have done when I had it apart. Broom out the barrel with a bronze brush and polish the bore to get a fresh start. If this was only fed Crosmans it might be antimony fouled. No amount of shooting or patching will clear that. It looked to be a low use rifle so I only patch cleaned and slugged the barrel. It also may just need to be shot more. Many of these guns get more accurate with use from smoothing the bore. My 95 and 30s are among my most accurate and they have stupid amounts of shots down their pipe.

 

[JEFFPPC]

I found a new 3-9x40 Airmax on the spares shelf. It's alot more porky than the Sightron but I don't have to worry about it breaking. It's a shame this happened I really liked the Sightron's weight size and fixed parallax. Plus the glass was great for it's price. It's boxed, labeled and ready to go back. We'll see what they do with this. I'll probably just put the replacement on my 17hmr.

View attachment 543944

And there is your 1000 yard range. I am officially jealous, lol. Nice view

 

[Mycapt65]

I wanted to try out the new bench so I brought out the 77. The wind was a solid 5-8mph and constantly changing strength and directions. I just had to ignore it. I shot this target. Ten shots at a 3/4" sticker at 25 yards. JSB makes the pellets in the top three groups. Only the AA was acceptable for the conditions.
The H&N FTT 4.51s did about the same. The H&N FTT 4.52s did noticeably better than all.

Looks like she's a fussy girl.