Semi-auto Bren piercing primers - any solutions?

[Peter Laidler]

Never seen that with any Bren but caps-out was a problem until they solved it, as Brian says, by staking the cap in place during ejection and knocking the cxxp out of it, to distort it when firing.

Could the striker hole be enlarged? Failing that, the answer must be excess pressure blowing back against a weak primer.

I did see a Bren accidentally fired without a locking shoulder. Te breech block was not locked up so came back and split. The magazine and rounds went upwards and onwards and are probably still in orbit around the moon. The blast from the round exploding in the breech caused the body to bulge and the gun being written off.

The locking ramp at the rear of the breech block ran hard into the rounded rear shoulder of the empty locking shoulder housing and stayed absolutely locked into place. So there was no excuse or waffle explanation that could explain it all away. But as the person who left the locking shoulder out was a young REME Craftsman, The Field and eventually, Base workshops were able to send it on its way to the great scrap yard in the sky. After all......., dog doesn't eat dog.