light strikes FTF- odyssey of a kadet

[painter]

I would choose the second one from the top that you highlighted.

Keep in mind that wire diameter is one of the most important factors in the 'strength' of a spring. Lighter springs are typically longer than stiffer springs.

[joerchi69]

Hello Painter,

i work on getting that spring. But the present vendor i found wants to have quite a lot of extra money just to work on the order, because i just need a little quantity of two. Besides the shipping costs and the higher single unit price.. Maybe i get it somewhere else.

But there is no need for speed actually. My surrounding region germany is ruled by the "discovery of slowness". Because of the goverments reactions to the epedemic flu all gun ranges are closed at least from today on. And schools, kindergardens, my workplace, clubs, some borders, some shops. To stay at home is recommended even it is no official curfew at the moment.

 So the shooting training is at home and in dry fire modus only. With the SCATT mounted i can practise at home and see the computed hits and the path of aiming on the screen. Seeing the ball of wool like aiming line i can try to get it tighter. And realising the meanderings and deviations when pulling the trigger in replay helps trying to correct towards a better neutral hold. I started shooting in my late fourties and decided to nerd in a little to catch up to the level of my shooting colleagues with decades of experience. I am sure that all can be learned with the same amount of training without the SCATT in regular dry fire and hot fire exercises. But i like the graphics aid and revelation what is happening watched in this way.



SCATT mounted on air pistol Steyr evo 10, home drill distance set on 4,8 meter

[painter]

Too bad about the springs.

That SCATT unit is a pricey unit over here.

[joerchi69]

It is pricey here too. Especially in relation to my income..
So it is quite special to me and i use it more often happy to have it. And to legitimate the holding to myself..

[joerchi69]

Too bad about the springs.

It is even getting worser. Because of just two springs and for hobby use i asked for a cheap envelope shipping and drop of the 15 Euro additional charge for orders under 50 Euro. The retailer wrote it is cash before delivery and sent me a acceptance of order without the 15 Euro in the summation, a total of 4,83 Euro.  Then i did prepay the total invoice price due to the sellers acceptance of order. 4,83 Euro, wich is not a low but a fair price. Yesterday they mailed me a bill including the 15 Euro, the springs are on the way. I refused in my answering mail to pay a additional rise of the price. Today they wrote i have to pay it when keeping the parcel. I answered i haven`t because the accepted my bank transfer due to their acceptance of order and confirmed it with starting shipping.

this years crazy spring time
 

[joerchi69]

Nope. TS and Shadow use different hammers.

Orderd the recomended TS hammer for affordable 28,10 Dollar / 24,90 Euro inclu shipping in Europe. It is an offer at the present.

https://www.ipscstore.com/en/cz-75-tactical-sports/505-cz-75-ts-hammer.html

CZ 75 TS hammer




CZ 75 TS hammer along almost original CZ 75 SP-01 Shadow hammer (edge rounded to not interfere with the FP retaining plate)

[Andres B]

That's the one. When you put them side by side, differences will become more obvious. Very different animal. You must fit the sear, tho, to make safety operational. Nothing too difficult. Lots on info in this forum. TS hammer hooks are cut very similar to other aftermarket SA ,,sport'' hammers, hooks are much lower etc. SA trigger needs adjustment too.

[joerchi69]

Do you notice any difference in precision shooting the heavier hammer ?

[joerchi69]

Still all the shooting ranges are closed in my living area in south germany. Besides many other things. So dry firing training is still prioritized.
To make it more diversified i also try 50Meters one handed.

[joerchi69]

8 weeks (shut down) shooting range pausing ended this week. Todays kadet setting; FP spring 0,25mm wire gauge, length 32mm. And a little shim of 0,1mm between upper and slide on the recoil spring housing. CCI SV. 400 shots one and two handed on 25 meters.
Started the first box of 50 rounds with a original length recoil spring - but got 5 failiures to feed. The slide did not strip the next round from the magazine. 2 times the slide did not stayed open on the last shot, also. Exchanged the recoil spring with the shortened variant and everything was fine for the next 3 packages. Light strike number one with box number 5 and a stove pipe. Had a look inside. Quite dirty. I kept on shooting without cleaning. Box 6 ran fine. But some of the first rounds of a new inserted mag did not chamber well wich appeared more often now. Box 7 one light strike and box 8 four light strikes. Will try to install the TS hammer some day, for testing how far i get it running without light strikes and without cleaning in between.


CCI SV dirt after 400 shots, ramp blockade

[joerchi69]

Sunday gunday. Not a single light strike today with 320 shots of CCI SV ammo.
On the first shots a failiure to feed. The lead nose of the round hang up on the ramp. My mags can not take 10 rounds. Usually i take maximum 7 or 8. But the number eigth already sits very tight in the mag.
On the last shots one time the slide did not stay open. In between the second pack of fifty, i thought having a light strikes with one cartridge. Tryed it two times. Then ejected it manually to check. There was no hit mark on the rim what lead me to check my firing pin. Because of the weak fp-spring i use since last time the fp-stop loosened, went over and blocked the FP. Built in the sping strechted a little, and went on.

[joerchi69]

That sunday i started with a original length recoil spring to use the kadet two handed with hv .22 ammo.
The firing pin stop got loose and blocked the FP. So i changed the ball pen FP spring back to the much stronger original but shortened FP spring. The gun worked as well with the CCI HV as the CCI SV. In our half open space urban gun club on sundays only .22 lr is used to avoid noise load.
I shot the kadet with the scatt mounted to have a look on the trace of my aiming and trigger pull when life-firing it.

[joerchi69]

Some quick shots of the setup Kadet + SCATT

You can understand the tracing line intuitively an try to correct your handling.
When calibrated with a few shots and the spotting scope there is no need to change the target any more, the hits are shown on the monitor. And a lot of statistics.

DenStinnet`s modification is done to get the UpLULA-KADET


Scatt mounted on a scatt Picatinny clamp on the Shadow 1 rail. We had to shim, modify, helicoil and glue the clamp with Loctite 638 to the rail to stay there even shoting the Shadow in 9mm. Probably the other, the new Picatinny PRO clamp is working better.


Distance 25 meters.

[joerchi69]

Just for loughs and giggles try to convert your Shadow to SA using TS original hammer. I have the same Kadet, bought used, manufactured in 95, with round FP. Ended up moding about everything. New style chizzle head FP, moded retaining plate, extractor, ejector etcetc. If you have original SADA hammer, examine if hammer hits upper part of Kadet. CZ SA hammer https://www.cz-spare.parts/cz-hammer-sa-sw-ts-cz while it works well in 9mm, hits Kadet FP little low. TS original hits right where it should hit. Also- TS original weighs 1 gram (dunno about your Imperial stuff) and mass seems to matter. Alot. Lighter hammer seems to lack good old oomph. Heavier hammer all things being equal, dents the primer kinda more deeply. I am using 13 pound (DUH your Imperial) hammer spring just to be sure, but even 11 ignites SB SV about 100 percent. Besides TS hammer is much more better made than Shadow one.
 Just my metric 2 cents:) Greetings from Estonia.

Hello Andres,
built in the heavier Tactical Sports (TS) hammer today. Will test it tomorrow,for (not having) light strikes with the CCI SV.

left: TS right: original



The hammer strut pin i had to press in with the vice.
TS hammer without disconnector. I use a single action trigger anyway.

[joerchi69]

For disassembly and reassembly i had a look on these helpfull sites:

https://www.texasguntalk.com/threads/break-down-and-polish-of-cz-75-sp01-tactical-75-bd-p01.30231/

https://czfirearms.us/index.php?topic=14688.0

https://czfirearms.us/index.php?topic=17104.0

https://www.youtube.com/watch?v=635FY1ituzM

https://www.youtube.com/watch?v=LnixFxN6Kec


It worked out, all parts on the table. HS 17lb wolff.