kahr cw 45 and Winchester primers

[Kynative]

This afternoon I went out to the small range on the back of my farm. Ill preface the rest of this by saying i'm new to reloading. Had my press about a month. Anyhow my kahr is failing to fire on blazer brass with small Winchester pistol primers with 4grains of bullseye under a 230 grain fmj and on rem brass with Winchester large pistol primers with 4 grains of bullseye under a 185 grain jhp.

This happened many times. I had some federal off the shelf 230 fmj and some rem off the shelf 230 fmj. Loaded em up and it goes bang every time.

Borrowed a friends Argentinian 1911. Stuffed it full of the afore mentioned hand loads and it goes bang every time. The same with a Taurus 24/7.

The kahr had fired 75 rounds of the blazer brass reloads the day before and had not been cleaned. I immediately came home and cleaned it thoroughly. Went right back out with mag full of the blazer brass reloads. It goes bang every time. Didnt have anymore of the rem brass reloads or I would have tried them too.

What gives? Do I give up on Winchester primers? Do I clean my gun every 50 rounds? Its had around 600 through it. Does it need a striker? Or a spring? Someone please shed some light on my situation.

Btw I took one of the rem brass reloads that didnt fire put it back in the kakr and it failed again. I then took the exact same round with two firing pin strikes on the primer stuck it in the 1911 and it went BANG! Frustrated

 

[orionengnr]

Both my Kahr P45 and a PM45 that I used to own did the same thing with my handloads, using Winchester primers.

Not sure what the deal is, but I don't shoot my handloads in my Kahrs.

 

[Kynative]

That is certainly one way to deal with it. I refuse to think im incapable of loading a dependable cartridge for that pistol. Thank you for.your input sir. I think I may try some different stuff before I give in. Wish me luck

 

[Clark]

I have a P45 that has a failure to fire problem.
I put a few hours into it, which is more than it deserves before I throw a handgun on the bone pile.

But I just noticed that the chamber does not meet SAAMI spec, it is too tight. If the gun does not lock up, it does not strike the primer right.

From my notes last month:

.472" chamber go, .473" pin gauge no go
SAAMI chamber .4744 - .4784"
so chamber is tight by at least .0015"

I will next try fix it with belt, suspender, and tighter pants:
1) Open the chamber
2) Make ammo with small case mouths
3) Get that spring pushing harder on the last .1" of pushing the slide forward.