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PostPosted: Sat Feb 16, 2019 9:41 pm 
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Location: Eastern Townships, P.Q.
Dukemeister wrote:
That's really nice work airmec. Would you post some chrony numbers on HPA before any valve mods?


Yeah sure :) . I wanted to chrony the rifle on CO2 with no mods, to get a solid reference for tuning and comparison. And of course on HPA with no mods, that will be the starting point for tuning it.

And thanks Daryl!

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PostPosted: Tue Feb 19, 2019 1:48 am 
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Joined: Mon Mar 28, 2016 1:32 pm
Posts: 50
Location: Edmonton
After looking up various guides online, and ordering some RE straight setback blades, decided to try my luck disassembling three rekord units, degreasing all parts, polishing the sears and relubing with moly powder suspended in engine oil... it was a long day... but worth it! Autosol on any rotary tool with a buffing head works great. With the straight trigger blades, the triggers now give a better feel (for me) and are as predictable as ever. All three have around a 13-14 oz trigger pull (still safe, checked sear engagement before reassembly and used the slap the butt-pad test, all good). Before there was discernible second stage creep before let off (particularly on the 77), now with the sears all polished up, the moment you break second stage, the sears just glide of each other making it seem as if there is no second stage creep! Now it's easy to barely hold the stock and just make a pinching motion with my thumb and index finger for a light, crisp, predictable and easily repeatable let off. Before, I had to more firmly grip the stock and use my index to pull the blade (which I think increased the chance to pull a shot). Might adjust the pull weight on the two sporter stocks to be even lighter though (something about the thumbhole stock that makes the pull seem lighter), just to make all three feel equal. All in all, very happy with the results.


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HereWeGo.jpg
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PolishedUp.jpg
PolishedUp.jpg [ 586.7 KiB | Viewed 354 times ]
FittedBlades.jpg
FittedBlades.jpg [ 153.5 KiB | Viewed 354 times ]
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PostPosted: Tue Feb 19, 2019 1:49 am 
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Joined: Mon Mar 28, 2016 1:32 pm
Posts: 50
Location: Edmonton
last pic


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PostPosted: Sun Mar 17, 2019 9:50 am 
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Location: Eastern Townships, P.Q.
I recently acquired a ''to be restored'' Crosman 187 CO2 air rifle, and I'm almost done restoring it. It's still missing the barrel band, which I'm not quite finished making, but everything else is there, so I was able to do a first chrony test this morning. Results are very satisfying, the rifle is shooting JSB Exact 8.44gr domed pellets in the 430fps range. Will do further testing in the following weeks with RWS and others pellets.

Some details about the rifle: It's a second generation version, made from 1962 to 1966, in Dunnville, Ontario, Canada. It has the cast trigger housing with lever-type safety (à-la QB78). It uses one 12gr CO2 cartridge, and pierces it on firing, again like a QB78. It's the .177 version of the Crosman 180 rifle. I saw somewhere it was the ''inspiration'' for the Industry Brand QB79 bottled rifle, like the Crosman 160 inspired the QB78D.

Also, this rifle came with a power adjuster in the U.S., but mine doesn't have one. The hole is there in the rear cocking knob, but there's no adjustment screw or even a threaded hole in the rear block. An early Canada-detuned example? I don't know, but the chrony results lean toward this 8) :)


Attachments:
187_almost_done.JPG
187_almost_done.JPG [ 39.23 KiB | Viewed 282 times ]
Made_in_Canada.JPG
Made_in_Canada.JPG [ 53.65 KiB | Viewed 282 times ]
187_first_chrony_test.JPG
187_first_chrony_test.JPG [ 48.15 KiB | Viewed 282 times ]

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PostPosted: Sun Mar 17, 2019 9:53 am 
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Location: Eastern Townships, P.Q.
Some more pics:


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Rear_block_no_screw.JPG
Rear_block_no_screw.JPG [ 30.89 KiB | Viewed 282 times ]
Hammer_rear.JPG
Hammer_rear.JPG [ 52.53 KiB | Viewed 282 times ]
On_the_main_burner.JPG
On_the_main_burner.JPG [ 48.71 KiB | Viewed 282 times ]

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PostPosted: Sun Mar 17, 2019 10:29 am 
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Location: Eastern Townships, P.Q.
Picture with the action in the stock, and right side view of the action:


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Cr187.JPG
Cr187.JPG [ 46.92 KiB | Viewed 287 times ]
new_parts.JPG
new_parts.JPG [ 61.19 KiB | Viewed 287 times ]

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PostPosted: Sun Mar 17, 2019 3:01 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
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Location: P.G. B.C.
Today - Sunday March 17th 2019 - packing up and heading to the range in 5 minutes.
Got some HW97 and PP700 shooting to do.

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PostPosted: Sat Mar 23, 2019 5:18 pm 
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Location: Eastern Townships, P.Q.
Finished the barrel band and screw today, I now have all the parts for the 187 :supz:


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IMG_5895.JPG
IMG_5895.JPG [ 164.46 KiB | Viewed 236 times ]
187_completed.JPG
187_completed.JPG [ 46.98 KiB | Viewed 236 times ]
rs2.JPG
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PostPosted: Sun Mar 24, 2019 9:12 am 
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You are very talented sir, wish I can do a little bit of machining


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PostPosted: Sun Mar 24, 2019 9:41 am 
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pistolero wrote:
You are very talented sir, wish I can do a little bit of machining


Thanks :) . Beware, hobby machining is another rabbit hole as deep as airgun hobby, if not deeper :lol:

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PostPosted: Sun Mar 24, 2019 10:28 am 
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Maybe we can share some project design


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PostPosted: Sun Mar 24, 2019 2:04 pm 
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Location: P.G. B.C.
What doing- loading up right away and heading out to the range to so some indoor shooting.
Both PP700 in .22 and HW97 in .177. Shooting 50 to 60 feet, apparently.


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IMG_2660.JPG
IMG_2660.JPG [ 80.71 KiB | Viewed 181 times ]
HW97 177.JPG
HW97 177.JPG [ 634.44 KiB | Viewed 181 times ]

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PostPosted: Mon Mar 25, 2019 4:54 am 
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pistolero wrote:
Maybe we can share some project design


Have something in mind?

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PostPosted: Mon Mar 25, 2019 8:35 am 
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Yes, like re-designing the internals for 1077 for example :roll:


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PostPosted: Thu Apr 04, 2019 6:04 pm 
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Hi all - No pics for this, just a couple simple things. I just bought a Crosman Vantage Nitro in .177 and put in the 10mm trigger adj screw per Kenny's Y-tube vid from myairgunreviews. I've saved several of his vids for reference. Also, I have a non-PAL Ruger Blackhawk that had a 'recessed' breech seal, about 5 years old. I cut a bit of foil from a coffee can 'seal' to make a shim - about .010 so that brings the seal to +.007-8 I guess. One last thing, the lever 'channels' in the stocks of both were very sharp so I 'broke' the edges with a fine file. Makes a more comfy hold. :wink: The Vantage stock is stained what I term baby-s*** brown, not a natural wood colour I've ever seen. And is a sort of matte finish as well. That's another project coming soon ...


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