Winchester LP Primer question…..

[Dale53]

USMCbrat;
You can definitely get a bad lot of primers. I have had it happen before. With all of the ammo companies running night and day and still failing to keep up with the demand, I would not be surprised AT ALL.

Call Winchester and have the lot numbers in front of you when you call. CCI replaced a lot of their primers that I was having misfires in factory standard guns (I had several thousand of them). It happens.

It really doesn't matter one bit whether or not anyone else has had problems or not. This is no doubt a different lot. If the revolvers are OK, then the primers are either bad or not seated correctly.

One other thing - if a primer fails to go off they nearly ALWAYS show a light dent. The "major damage" regarding depth of primer dent is caused after ignition. The primer backs out, then the pressure causes the case to set back (with firing pin protruding) and THAT is when you get the deep firing pin indentation.

Dale53

 

[USMCbrat]

Originally posted by Dale53:
One other thing - if a primer fails to go off they nearly ALWAYS show a light dent. The "major damage" regarding depth of primer dent is caused after ignition. The primer backs out, then the pressure causes the case to set back (with firing pin protruding) and THAT is when you get the deep firing pin indentation.
Dale53

Interesting .....in my missfires, there is a light dent. The ones that fire show a deep dent.

 

[Dale53]

Interesting .....in my missfires, there is a light dent. The ones that fire show a deep dent.

That's what I said. When they fire, the dent is deep but that is NOT from the firing impulse.

The cycle runs like this:

1 - Firing pin strikes the primer (does not make
a deep dent whether or not it fires)
2 - When the pin hits the primer, it drives the
entire case forward as the primer fires
3 - The primer backs out of the case, the powder
ignites and the pressure drives the case
backwards, reseating the primer and driving
it backwards (together with the case), as
the bullet goes forward, impressing the
primer over the extended firing pin until
stopped by the breech face thereby causing
the deep dent in the primer.

FWIW
Dale53