KANECAP 7mm REALFLAME caps not firing.

Hello, has anyone ever used these caps before because I have purchased 2 boxes (about 4 months apart) and about only 1 out of 15 fires. I am using a Shu Wei Beretta M92F and I have stretched the firing pin spring a little to give the hammer more strength upon striking. The caps have a very clear and deep dent after being struck but it does not fire. I have tried MGC caps and they fire flawlessly but the metal slide on the Shu Wei Beretta are a bit too heavy for MGC caps thus making the pistol fire on full auto most of the time.

Does anyone know what's the problem?

Thanks!

Sadly it happens from time to time...
There are other threads with similar problems, for example here's an old one:
https://mp40modelguns.forumotion.net/t353-weak-caps

I had a similar problem with 5mm MGC caps, can't find a thread though.

Cerwyn wrote:

Hello picure

I have a WaShan Beretta M9 which I fire using MG caps almost always loaded into MGC P220 cartridges. They've performed without problems in either Semi Auto or Full Auto. Which cartridges do you use? Do the caps make any attempt at igniting?

I have used RealFlame caps on rare occasions in other models (KSC Beretta M93R for instance) without problems.

It is possible to have faulty caps, but 2 boxes in succession isn't that likely. Are there are humidity problems there in Taiwan? We've read reports here that caps have to be stored very carefully to avoid the caps absorbing water from the air.

I am using ammo from a box of 15 with "CP-HW 9mm Parabellum" written on it. I think they are Shu Wei rounds. And yes, Taiwan can get pretty humid. Maybe thats the problem.

Thanks!