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PostPosted: Sun May 16, 2021 5:53 pm 
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Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2374
Location: Spruce Grove AB
I thought about the barrel lockup, hoping it's consistent! I try to repeat everything exactly the same each shot to begin with.
Just heading out to shoot it now. :wink:


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PostPosted: Sun May 16, 2021 9:56 pm 
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Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2374
Location: Spruce Grove AB
Well it was a very informal shooting session. I had a sheet of plywood and a bic pen. I managed to sight the gun, although my front sight needs to be shorter... It still shoots but it is quite sensitive to how I close the barrel. One group is dead on, the next is 3" high after deliberately closing the barrel harder.... Also it is the father in law's birthday so some alcohol was involved...

I managed 2" groups with jsb kings. At 30 yards. No pics cuz it wasn't really worth it. :lol: I'd get 3 really good shots and 2 flyers with each group. I blame the drink :lol:


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PostPosted: Sun May 16, 2021 11:29 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
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Location: P.G. B.C.
:drinkers: That'll do it for sure.

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PostPosted: Sun Aug 01, 2021 1:30 pm 
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Joined: Thu Oct 13, 2005 4:20 pm
Posts: 2374
Location: Spruce Grove AB
Finally back at the Springer project. Took an extended hiatus to play around with a couple PCP guns.

I have new material to work with now, chromoly tubing. Some better lathe tools as well, makes a huge difference :lol:
I have also added silver solder to my arsenal... Got plans for that.

This time around the goal is to make the piston an easier build.
So, instead of threading the head and body together, I'm trying dowel pins. Maybe set screws to hold the pins in place. Hopefully everything holds.

I have 2 new test guns to work with at the moment. One in .25 and one in .177. the stock 177 shoots 10.5 gr pellets at 1175fps :lol: which I think is more horse power than the .25 I tuned previously. I think that one might get detuned... Short stroke or some other experiment. I'm still trying to work out a way to fit a chamber sleeve and a skirtless piston like a fixed barrel Springer uses. It could be interesting.

I welcome any ideas or concerns from y'all. I don't really claim to know what I'm doing all the time. I just like doing.


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PostPosted: Sun Aug 01, 2021 2:42 pm 
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Joined: Thu Jun 01, 2006 7:37 pm
Posts: 1010
Location: Edmonton,AB.
Would be interesting to see how the .177 would do with a light slug.

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PostPosted: Sun Aug 01, 2021 3:48 pm 
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Location: Spruce Grove AB
I had that thought also.
Where would a guy find them?


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PostPosted: Sun Aug 01, 2021 7:49 pm 
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Joined: Thu Jun 01, 2006 7:37 pm
Posts: 1010
Location: Edmonton,AB.
Not sure.
I’m looking at the NOE bullet mould for a .22 slug that my FX may like. Someone on CAF had to of played with these moulds already ,and are more than willing to share their story! :wink: :mrgreen:
If one could get a 10.5 grain .177 slug moving at 1300-1400 FPS,it would probably be devastating out to 50 yards on a gopher skull!!
Walter

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PostPosted: Thu Aug 05, 2021 12:04 am 
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Location: Spruce Grove AB
I see some 15 grain slugs by NSA, it would be pretty interesting to try them out. I would expect them to maybe make high 800s, well that's my guess anywho.


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PostPosted: Tue Oct 19, 2021 6:04 pm 
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Location: Spruce Grove AB
Well an update on that .177 xs28, it shoots the 13gr Jsb pellets pretty nice, beer cans at 50 yards easy. I never did touch the gun, just put a breech seal in it. Shoots around 920 ish anyway.
Gifted it to my brother in law. He loves the thing. :lol:

Now, I got the urge to finish another piston.
Here's the general layout with the guide.
All 4130 tubing and rod. the piston head is aluminum. It is getting secured with Countersunk cap head screws. Just about finished that...

The delrin washer on the back of the head can spin freely.
Fancy engineering. :lol:
No top hat... But the guide is extra long so we will see.


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PostPosted: Thu Oct 21, 2021 2:44 pm 
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Location: Spruce Grove AB
Here it is all prettied up.
Installed 3 buttons on the skirt, then realized that wasn't going to work with a rotating piston design... So i ringed it.

Weight of the new piston is 250 grams, where the stock one is 380 grams. Took a couple test shots and it's very smooth. Just waiting on moly now...


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PostPosted: Thu Oct 21, 2021 5:08 pm 
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Location: P.G. B.C.
Been silver soldering long? I am talking about the high temp stuff. In the States, they call it silver brazing.
Since high temp silver soldering game along, long before low temp silver (5% or so) soldering, we(from Ontario)
call high temp silver soldering, just silver soldering.
Cleanliness is the rule and then it flows beautifully.
A good flux helps, but straight borax works just fine.

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PostPosted: Thu Oct 21, 2021 5:14 pm 
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Joined: Thu Oct 13, 2005 4:20 pm
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Location: Spruce Grove AB
You spotted that did you? Or did I mention I'd be soldering?
Just the steel ring needed attaching at the skirt. Figured soldering would be easier than threading.
I have been messing with the silver solder for a little bit now.
Being a concrete cutter, sometimes I re-tip the coring bits. The segments get silver soldered onto the barrel. But cleanliness isn't really important.

What do you do with borax? It's a powder is it not?


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PostPosted: Thu Oct 21, 2021 6:28 pm 
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Borax Cone and dish, your thinking of the borax detergent, believe I heard it can be used as well
https://www.youtube.com/watch?v=Jav11RRnKUQ

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PostPosted: Fri Oct 22, 2021 12:27 pm 
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Location: P.G. B.C.
Powdered borax is used as a sliver solder (high temp) flux. Some commercial silver solder (high temp) fluxes are borax in a liquid state.
High temp silver solders have working temperatures from just over 1,000F to 1,300F (537.8C to 704.4C) & tensile strengths of a good bond(.001"), up to 70,000psi.
The cleanliness is needed of the parts being joined, to get a good solid bond.
The bulk tensile strength of silver braze alloys is 40,000-70,000 psi. When (silver) brazing copper-based alloys, failure will occur in the copper or brass.
The carbide teeth on the big saw-mil saws are silver soldered to the tooth backing of the saw blades.

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PostPosted: Fri Oct 22, 2021 11:36 pm 
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Joined: Mon Mar 28, 2016 1:32 pm
Posts: 198
Location: Edmonton
killercrow wrote:
Weight of the new piston is 250 grams, where the stock one is 380 grams. Took a couple test shots and it's very smooth. Just waiting on moly now...


You want some moly Al? Got some of the Maccari stuff, I can scoop you up some, you only need a bit. And we can do a dead drop again. Although I do recommend that Tungsten Disulfide mix for lubing the piston and guides. Find moly too thick, robs a bit of velocity. I just use it for detents and pivot points on my guns. Great vibration dampener but then again you have the capability to turn your own fitted guides.

Glad to see this project back!:-)


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