light strikes FTF- odyssey of a kadet

[joerchi69]

I also shot the first time with a "slide spacer " on the recoil spring housing to conserve the barrel pin. Found the topic here:
https://czfirearms.us/index.php?topic=39826.0

Tryed to size it to have the same time contact of slide to "upper",  and contact area over breech face to barrel. 
I am not a native english writer. Help with gunsmith nomenclature is appreciated..
0,35mm = 0.0137 inches improvised combo of some random but sturdy materials.

Rough-and-ready spacers, outlasted testing.


same time contact area 1 (0,35mm = 0.0137 inches feeler gauge)


same time contact area 2 (closed and without toothpick)

[joerchi69]

If you want to get a replacement beforehand, the size is 3 x 12 mm.

Good idea! I orderd some not holow hardened steel pins. 3x12mm, Stahl DIN7 ,Passstifte. They are made for a tight fit.
Will share pins and knowledge with other Kadet shooters i know.

[joerchi69]

I'd take just a touch more off that firing pin.

Thats the way round to the new FP2 pinch area. Took a used jacket to get the dents. The end result is aside the toothpick. May be i overdid it a bit - it was more than just a touch what is removed. Will hear if it is to narrow, now it is avoiding the full brass area for sure. Like the round dent, which is from a old style Kadet FP. Looking forward to try the mod out.



A untouched FP is waiting to be compared for reliability. And possibly to get the 2 mods who have worked out for this kadet if it is necessary. The the reshaping, removing material on the opposite side of that's already beveled. And a little shortening of the rear shoulder.

[painter]

It possible that the heavy stock spring is responsible for some of the failure to feed, and no hold back on empty.

Can you get a 17 lb spring?

Wolff ships overseas if none are available locally... https://www.gunsprings.com/index.php?page=International-Orders

[joerchi69]

It possible that the heavy stock spring is responsible for some of the failure to feed, and no hold back on empty.

Can you get a 17 lb spring?

Wolff ships overseas if none are available locally... https://www.gunsprings.com/index.php?page=International-Orders

Hello Painter,

thank you very much. Yes i will get a 17 lb spring. I started acting in that direction too and already removed the extra preloading spacer under the 20 lb HS to work down a little.

Trawling through many of yours and others posts, i found the 17 lb mainspring is recomended as the lowest possible with a highly reliable ignition rate. So i will give it a try for sure. Some needed a 22 lb or even stronger HS to restore the Kadet to normal function, i picked up. Concerning springs and firing. I still have missfires and slide errors. So i have to work on both to get it solid working with more than just one sort of ammo. And not only the expensive stuff. I like to test more variety of ammo too.

The wolff USA order was confirmed the 4 of september and hopefully is on the way over the big ocean. Three of the stronger xtra power hammer springs (22,24,26,lb) and a the hammer spring pack wich is including a 17 lb.



 (Hammer Spring Pak For use in: Traditional configuration, standard (full size)  & longslide models.  This hammer spring pak contains 1 each of 16, 17, 18 and 19 pound reduced power hammer springs described above, allowing adjustment of the firearm to individual requirements.)
The wolff staff member i was mailing with, was also very helpfull to figure out what kind of spring is built in a 6" Nowlin (Senior) PPC 1911 in 9mm from around the year 2000. I got it used this year, but in good condition. And i like to have the proper springs in stock.

We also compared the measuring of my CZ Shadow 1 spring and he wrote it looks like the CZ 75 hammer springs (full size) will fit. The CZ 75 20 lb. (factory standard) spring we make measures as follows:
Wire - .045”
End OD - .264” & .262”
Body OD / ID - .258” / .168”
Length – 2.44 inches with 29 coils

[painter]

I don't think std velocity 22 ammo will have enough power to move the slide all the way to the rear to feed the next round from the mag, or lock back with those extra power springs. I could be wrong.

If you shoot a steady diet of mini mags, or the very high velocity stuff like velocitors...maybe.

I think the right way to go is to put in the 17 lb spring, and shoot quality std velocity ammo, and go from there.

[joerchi69]

Hello Painter,

i will use your hands-on experience starting spring trail and error with the 17 lbs .

Greetings
Joe

[joerchi69]

This afternoon i started with 50 CCI sv and 5 missing rounds in the chamber. The slide also did not stay open on the last round 3 times. The above mentioned slide spacer i did reduce in width for taking that out of the calculation for light strikes. When pushing the magazin release button the mag came out and unintentionally the slide closed at the same time. This happend more often today.  4 missfires on that first box brought me to the thougt i maybe did to much filing to the FP tip.

Then i shot a pack of 100 CCI select. With shot 50 came a missfire - the first ever with that type of ammo in my kadet.
Cleaning the chamber and breech face and the correlativ barrel face i finished the full box without trouble.

Went on with 50 Blazers with one time slide closing on the last rd and 3 missfires.

Following with 50 rds greasy Geco Semi Auto with surprisingly no issues. With the uplula the fingers stayed largely non fat.

Again i grabbed a box of CCI sv. 6 Missfires and one slide close issue.

Cleaned the chamber and changed to the brandnew and unmodified FP 3. Not a single missfire. 2 non chambering rounds, 2 times the slide did not stayed open with this 20 lb HS. No light strikes and that with 2 boxes of CCI sv ! 100 rds total of the ammo who gave me the most issues before. With the mod. FP2.

Also 50 Blazers followed with completely no issues. Just the mentioned slide closings when releasing the mags. That happend several times today.

Okay. I overtuned FP 2 maybe. Too far away from the rim. See pics above. This modification to avoid the strong, just solid brass rim area without priming compound in it, to be striked by the FP. In principle i think it is just logic and true. To have more momentum on the softer part of the rim.

On the other hand seeing the regular new FP 3 just thrown in, with its large chissel tip is working that well, is quite surprising for me. Happy ! it works. But don´t know why.  Missing the logical explanation..

[joerchi69]

Found some metal swarf between slide and recoil spring tube. Czechnology ? Cleaned it up, reassembling with Loctite 638.

[joerchi69]

If you want to get a replacement beforehand, the size is 3 x 12 mm.

Good idea! I ordered some not holow hardened steel pins. 3x12mm, Stahl DIN7 ,Passstifte. They are made for a tight fit.
Will share pins and knowledge with other Kadet shooters i know.

Done.

[joerchi69]

Top down i-dent-ification

50 CCI sv FP3=new+unmodified, no issues, cleaned breech face barrel contact surface before and after
50 CCI sv FP1 modified= shorter hit area, longer end for hammer (0,7mm), 1missfire, 1 rd not delivered
35 SK Pistol Match, FP1, 3 missfires, cleaned it afterwards
15 SK Pistol Match, FP3, 1 not delivered, 4th row 1st case not ejected-got second strike, only to remove with cleaning stick from front
50 Blazer FP3, no issues




Finally with no missfires but one rd missing and one slide not open on last rd another 50 CCI sv FP3. No brass picked to compare.
The SK Pistol Match where very oily but using the uplula the fingers stayed cleaner when loading the magazine.

Same motive without flash.

[joerchi69]

Todays sunday gunday results, FP 3 - new and original, shortened FP spring as usual.
Still waiting for the wolff xtra power springs and calibration package. The shipment from wolff gunsprings needed only 2 days from them to Frankfurt/ Germany airport. For more than 10 days it is in transit for the further 165 miles.

Duell training one and two handed:
100 CCI Select one missfire
200 CCI SV      one missfire, and on some the slide did not stayed open on the last round
Used thin oil (ceramic) on the rails as usual. The new solid barrel pin did not move.


The two missfires, light strikes, ejected them to see the dents, loaded in the mag again, worked then on the second strike

[joerchi69]

Reminder: Testing of stronger hammersprings additional with a shortened recoil spring to get it reliably working with SV ammo.

[Bossgobbler]

Have you tried to mill 0.030 off the face of the firing pin retainer where the hammer hits? Also, try to reshape the firing pin so it does not hit on the edge of the rim of the case.

Do you mean to remove the material of the complete surface of the FP retaining plate ?
Or just the area where the hammer hits, and not in the slot-areas where the plate is hold in the slide ?

Just the area where the hammer hits

[joerchi69]

Still waiting for the wolff xtra power springs and calibration package. The shipment from wolff gunsprings needed only 2 days from them to Frankfurt/ Germany airport. For more than 10 days it is in transit for the further 165 miles.

The wolff spring set arrived today. 3 weeks (and 12 Euro) from Frankfurt Airport through customs to my adress.