light strikes FTF- odyssey of a kadet

[joerchi69]

It went quite good today. Especially in the beginning i could bring 5 in a row into the center of the target 25 meter. The new glas in the shooting glases results in a very clear sight picture. Later on i had a light strike, also with cocking the hammer a second and third time (tooth-pic ).Checking the firing pin retaining plate i realised the firing pin had turned a quarter and was blocked in the hole of the retaining plate. Rearranged it worked fine again. Because it was more than one time that it has happened with that lighter firing spring i will have to go on searching for a better one.
 At home i removed it. Wire dia was 0,31 mm/ 0,012 inch. Length was 30 mm/ 1,2 inch. I found nothing with a little more wire diameter so i put in the shortened original FP spring with wire dia 0,48 mm/ 0,019 inch length cut down to 24 mm/ 0,94 inch. So i will give it a try next time. Maybe with the built in components it will work out as reliable. The heavier tactical sports hammer, the reduced power 17 lb wolff hammer spring and the optimised FP4. But also between the nearly reliable wire dia of 0,31 mm/ 0,012 inch up to the original wire dia of 0,48 mm/ 0,019 inch it should be possible to find some more springs for testing. Outer dia from aproximately 3,77 mm to 4,0 mm.

very light strike with blocked FP (tooth pic pointing at)

[joerchi69]

I couldn't get an ID.

Hope it helps you find a spring.

Looks like a right wire diameter was already mentioned by painter some time ago..

[joerchi69]

Realizing there is a little noodeling between the kadet conversion kit and the frame - i got curious.
Upper to frame has a play of 0,5 mm / 0.23 inch. Not at the front sight, where the fitting is in the rails. Only at the rear end at the rear sight. The rear sight blade in itself is a little wobbly too. But here i mean the complete rear end, that can be moved up and down. Did some messuring with the feeler gauge 0,10 mm / 0.196 minimum and 0,6 mm / 0.236 max. Did a calculation using https://stores.kensight.com/front-sight-height-guide/. On the 25 Meter / 27,34 yard target it can add up to a impact distance height variable of 7,8 cm / 3,075 inch. Nice exculpation for poor grouping too. 
Also did measure with the caliper. So the conversion kit borehole is widened - where the upper is fixed within the frame by the slide stop. The bore holes in the frame and the slide stop dia match quite good. Same with the 9 mm slide stop.
Provisionaly i tested and glued in a piece of plastic to take out the play. I dont expect it to be a long term solution. Also the fitting is a little too tight, the slide stop is not moving freely enough axial to catch the slide on the last round, when it should be lifted up by the magazin follower.

[joerchi69]

minimum play


maximum play

[joerchi69]

provisorily plastic shim material

https://i.imgur.com/s3zQpOf.jpg[/img]

[joerchi69]

Got a new lighter FP spring, wire die 0,40 mm/ 0.0157 inch, length 30 mm/ 1,2 inch. outer dia 4mm / 0.157 inch. Will test it next time on the range too. Did not get one with the exact wire dia of painters FP spring. But close.

.22 lr casing as scale
wire dia 0,31 mm/ 0,012 inch, length 30 mm/ 1,2 inch - FP reetaining plate loosened an FP turned a quarter
wire dia 0,48 mm/ 0,019 inch, original kadet FP spring
wire die 0,40 mm/ 0.0157 inch, length 30 mm/ 1,2 inch - next shoo-in
https://i.imgur.com/lHoYDYR.jpg[/img]

[joerchi69]

Had have only 100 shots of CCI SV today. Tested the shim. And had no light strikes with the shortened original FP spring with wire dia 0,48 mm/ 0,019 inch length cut down to 24 mm/ 0,94 inch. With the same other configuration as the last months since October 09, 2020 :  the heavier tactical sports hammer, the reduced power 17 lb wolff hammer spring and the optimised FP4. And the slightly lighter trigger spring with wire dia of 0,8mm / 0,0315 inch. The trigger pull wight is estimated around 1,1 Kg / 2,5 lbs .

With the shim i recon a better accuracy then before. The sight picture reproduces more exactly on the paper target. But i have to make more shooting for a summary. With the plastic shim the slide stop sits very tight and so the slide is mostly not getting catched on the last round. With the plastic glued in just on one side in the borehole, i assume the upper pressed in a to high position - so the slide is maybe rubbing a little more in the rails. And i found fresh rubbing marks on the "underside of the rear sights". So a shimming wich is centering the slide release would be the better option.. Starting a apprenticeship at a gunsmith would be a nice option. Wish 

[joerchi69]

Lady Luck lead me, a 52 year old kadet on his odyssey, to a young gunsmith master and hunter in the black forest.
He offerd me a practical training lately. At his one man operated rifle workshop. Wich is located aside his fathers and grand fathers turnery and cnc shop. Before learning machine working at the lathe and milling machine to get ready to repair the .22 conversion kit´s plastic stripe shimmed worn out drill hole for the slide catch lever - the very first thing to start with is, to learn acceptably metal filing. Wich i try for four weeks now, tenacious. 

first planar files
https://i.imgur.com/1AqNxLt.jpg[/img]

then a first tool work in progress
https://i.imgur.com/SdbiSKU.jpg[/img]

https://i.imgur.com/wyHuP9r.jpg[/img]



how to philosophize with a hammer
https://i.imgur.com/KUocI0I.jpg[/img]

As you can imagine, fascinating things are going on around my vice
and customers bring some interesting stuff, three barrel gun mechanics, a quicken pic only, for now
https://i.imgur.com/8e7WIYW.jpg[/img]

[MuayThaiJJ]

WHERE do I get CZ Shadow 2 Kadet FIRING PIN?
I can't find one anywhere....does anyone know where to get one?

thanks!
N

[joerchi69]

WHERE do I get CZ Shadow 2 Kadet FIRING PIN?
I can't find one anywhere....does anyone know where to get one?

thanks!
N

don´t have informations for the CZ Shadow 2 Kadet FIRING PIN

ordered it here but for the shadow 1 Kadet - but it is not listed right now


https://www.cz-spare.parts/search?query=kadet+firing+pin

https://www.cz-spare.parts/

[joerchi69]

Could work a little on the Kadet today in the workshop.

Changed the ejector to a new unfiled one. The first i had over-filed (see some posts before )
and it maybe helped to produce stovepipes sometimes. The timing when the ejector hit
the spent case was probably late. The ejector pin was sitting very strong - i bent another punch.
Shortened it and then it worked. With some heat involved and a vice. Dove tail shaped slot and part.


A first test with a box of 50 CCI sv was flawless.

A screwdriver to the opposite and this tool in the picture is needed to remove the sight blade.
It was loose, had some play. With a little bending ( in a vice with a little hammer )
 it is sitting without play now



Flattened the filed down front sight in an angle in the mill. Blacked the surface.

[MuayThaiJJ]

Looks awesome dude, do you have an extra firing pin for a Shadow 2 Kadet?

[joerchi69]

Sorry but no i don´t.
Go to someone with a lathe and give him the original to reproduce may be ?

[joerchi69]

Tested the new unfiled ejector with 50 CCI SV - got two stovepipes. Will have to modify the corner of the ejector carefully.
Unexpectedly a missfired shot appeared, it worked when reloaded the cartridge again. Both dents were decent. Cut of another winding of the firing pin spring. It measures 23 mm / 0,90 inch now. Still has hopefully enough tension to secure the firing pin by pressing it against the FP stop. Also have additional spring options.
The plastic shim is removed. At the work shop we tightend the bore zone for the slide stop pin. Compressed it carefully. Hitting it one time with a heavy hammer on a placed chissel. In the area where the recoilspring rod is placed under the barrel. For that hammer blow, the upper was clamped in a vice - it is still no tight fitting. Needs some more force maybe. Given that the sight and the barrel are conected - it should not matter for accuracy in the first place.

https://i.imgur.com/CusXjME.jpg?1[/img]
 
Unchanged other configuration as the last months since October 09, 2020 :  the heavier tactical sports hammer, the reduced power 17 lb wolff hammer spring and the optimised FP4 with shortened FPspring in orig. dia. And the slightly lighter trigger spring with wire dia of 0,8mm / 0,0315 inch. The trigger pull wight is estimated around 1,1 Kg / 2,5 lbs.

[joerchi69]

Put some dental occlusion spray on the ejection port - to study the hit marks of the spent cases of the standard velocity cartridges. With the unmod and lately built in ejector.

After 4 shots without stove pipes:
https://i.imgur.com/XUjaQGJ.jpg[/img]
https://i.imgur.com/9LVHlQz.jpg[/img]


sprayed it again and then a series shot with a stovie :


the stovie´s contact point is very close to the ejector
https://i.imgur.com/kibQ4fH.jpg[/img]
https://i.imgur.com/dSc36Gg.jpg[/img]

when stopping shooting after 3-4 stove pipes and maybe 30 to 60 rounds (SV CCI and SV Sellier&Bellot)  it looked like this (maybe some cases did took the direct way out without touching the ejection port)
https://i.imgur.com/QrMiUj0.jpg[/img]

Think i have to do a very little filing to the ejector.
Maybe additonally the extractor is not optimal working. And sometimes gives the spent case free on the way back, bevore it can hit the ejector ?

https://i.imgur.com/WficXY4.jpg[/img]
another failure to eject and hitmarks in the port can be seen on this foto
https://i.imgur.com/fvgiD73.jpg[/img]

Think i will do a light modification to the ejector as described in the forum. Then check again with the spray.
Blacken it with the grime/soot of a candle or oillamp for example, would be the traditional way to find the contact points or areas.