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The $100 challenge.....
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mercs View Drop Down
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Posts: 340 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mercs Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2023 at 2:42pm
Now the owner of an Air Chief Junior, mine arrived in very good order.



Cleaned and lubricated before use, mechanism is smooth and easy to operate with repeatable fps.
The truth about the rifle will require a bench test which I will get onto but far from disappointed.
Trigger will definitely get some attention but I have owned worse.
Fitting a basic scope will also be interesting.

Air Chief.177 Junior
Pellet BrandRWS
Pellet typePro-Line
Average fps457
Grains8.2
grams0.53
foot pounds3.8
Joules5.16

Out of the box


Breech was clean and seal in good order but whether machine or hand finished workmanship is definitely poor.


Barrel looks ok but needed a good clean.


10 metres standing. Sights left as found. POA the bull with resulting 50mm OD group. 
Front sight obscured the bull.


Upgrade number 1, Red Dot sight installed


Repeated test with resulting 45mm group, looked as if I would improve to within 25mm but messed up last couple of shots, I had done better when sighting in so need to check a few things out.


Gamo 4x32 scope fitted


10 metres with Gamo scope gave a 35mm group using AirArms Diablo Field Heavy 10.3 grains
Technology and posh pellets do not make a big difference. I suppose it would shoot at a 50mm plinking target and deliver some backyard fun.





Edited by mercs - 29 Aug 2023 at 2:01pm
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KiwiTR6 View Drop Down
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Posts: 382 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KiwiTR6 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2023 at 2:52pm
First play tonight with the little gun tonight.  Put it across the chrony first, lots of smoke but the speed came up to just over 500 fps using 8.44gr JSB Exact 4.52 pellets.  Then a batch of 10 shots at 6m with the standard sights with no adjustments.  Not too far off the target centre and quite a tight little group of 7 pellets.  I then stretched it out to 10m but with my glasses there was no way I could see through the sights so I pretty much had to guess where the centres was and the group reflects that.

I've since removed the front sight, it took a fair bit of effort with the hammer against the vice-grips to get it to move.  The crown doesn't look too bad at all, the crap on it in the picture I suspect is thread lock from the sight installation.  I was planning on cleaning it up in the lathe but it might not be worth the effort.

The next step  is to clean the barrel and fit my little 4x32 Tasco scope.  Hopefully my 10m groups will improve when I can actually see the target!







Edited by KiwiTR6 - 26 Aug 2023 at 2:56pm
Daystate Red Wolf .22
FX Dreamline .22
Diana Outlaw .22
AA S410 .22
HW98 .177
HW30 .177
Diana 340 E-Tec .177
FWB Sport 124 .177
Gamo 900 .22
Baikal IJ-22 .177
Crosman 2240 Custom .22
Brocock GP .22
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RangerPete View Drop Down
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Posts: 1023 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RangerPete Quote  Post ReplyReply Direct Link To This Post Posted: 26 Aug 2023 at 3:38pm
U got an owners manual… no fair. I want one too.

Does anyone have one of those recoil absorbing bases that goes under the one piece gamo mount/rings that they want to donate or sell?
That Ranger scope I wanted to fit is super long and I need to lift it up so the breech can open.
Walk quietly, but carry a big stick.
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KiwiTR6 View Drop Down
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Posts: 382 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KiwiTR6 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 6:23am
Kruz, how easy did the barrel pivot bolt come out?  Did you just force the peened end through the thread or machine it off somehow first?
Daystate Red Wolf .22
FX Dreamline .22
Diana Outlaw .22
AA S410 .22
HW98 .177
HW30 .177
Diana 340 E-Tec .177
FWB Sport 124 .177
Gamo 900 .22
Baikal IJ-22 .177
Crosman 2240 Custom .22
Brocock GP .22
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kruzaroad View Drop Down
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Posts: 2617 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 7:03am
No I started by unscrewing it, once I had removed the locking bolt next to it.
Then once it was out of the oppistite side threads moved the barrel till the tension was off the pin and pulled it out.
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Billbobnz View Drop Down
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Posts: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 7:04am
Well I have tightened up the breech as far as I can go before fear of stripping the Philips head out and I still have alot of lateral movement so I am going to have to shim the breech.

Also noticed that the breech end of the barrel the barrel is definitely oval or off centre only where it's fitted into the breech block. Then it's perfectly straight after that. Maybe if I can remove the barrel I could cut this section off and machine down and refit and put up with the shorter barrel.

Over baited Starlings at 12m Ive missed 3 from 3. I'll head out with the old BSA meteor and see what I can do in exchange
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kruzaroad View Drop Down
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Posts: 2617 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 7:10am
It has play when it's open. Mine lost it all when closed.
Whats the difference in height between top and bottom of angled bit.
I'm gonna head out in hour or two. Apperently the hares are.chasing each other on the bottom paddocks
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Billbobnz View Drop Down
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Posts: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 7:59am
You can laugh at me all you like.....

But yes this @#$$)@*£}€÷ did strip out when I tried to remove it..... That will be after works job on Monday with an extractor
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Billbobnz View Drop Down
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Posts: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 8:02am
With the compression tube against a straight edge the barrel is at around 3° downwards
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kruzaroad View Drop Down
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Posts: 2617 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 8:35am
That's a big drop over the barrel length.
Did you strip the Phillips head or the threads.?
Tou can put a ring spanner on the head.
How's the starlings going.
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Billbobnz View Drop Down
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Posts: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 8:39am
Here is the head here. No starlings yet. Night actually go out with the cr600
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kruzaroad View Drop Down
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Posts: 2617 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 8:47am
I used a ring spanner to tighten up harder.
Heres a question about refacing the breech.
If your breach sits flush with the reciever, and is based around a single pivot point. Won't squaring the breech face allow the top in closer but move the bottom out?
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KiwiTR6 View Drop Down
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Posts: 382 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KiwiTR6 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 9:28am
I think I might try to remove the peening before I attempt to take the pivot out....
Daystate Red Wolf .22
FX Dreamline .22
Diana Outlaw .22
AA S410 .22
HW98 .177
HW30 .177
Diana 340 E-Tec .177
FWB Sport 124 .177
Gamo 900 .22
Baikal IJ-22 .177
Crosman 2240 Custom .22
Brocock GP .22
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KiwiTR6 View Drop Down
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Well I went backwards tonight.  I cleaned the barrel and fitted the little Tasco.  I was really looking forward to shooting some decent groups, but even sighting in at 6m they were all over the place.  The scope was good and firm, I'd earlier tightened the stock screws and they were still good.  I went back to 10m and could achieve absolutely no consistency at all, so bad in fact that I'm not going to bother posting any groups because their weren't any.  

So, off came the scope and the stock.  The barrel is dead straight and the rifling looks good to me although I have very little experience with these things.  However, the cylinder is shaped like a banana.  My glasses tend to make all straight lines look curved but the steel ruler doesn't lie!  I don't know if this could be part of my problem, but when I get the thing fully dismantled I'm going to make up some half circle wooden support block and press it back into alignment....






Edited by KiwiTR6 - 27 Aug 2023 at 3:17pm
Daystate Red Wolf .22
FX Dreamline .22
Diana Outlaw .22
AA S410 .22
HW98 .177
HW30 .177
Diana 340 E-Tec .177
FWB Sport 124 .177
Gamo 900 .22
Baikal IJ-22 .177
Crosman 2240 Custom .22
Brocock GP .22
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Billbobnz View Drop Down
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Posts: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 27 Aug 2023 at 3:30pm
Oh goodness @KiwiTR6, can I swap my cylinder for yours, then you might have a half decent gun!

I hope you guys that took up this challenge, dont all come after me with pitchforks hahaha
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