Marked Brass

[trick1911]

Hello all, I'm seeing a indention on my brass. looking at the primer side, it has a straight line from about 2 o'clock to 5 o'clock. this happens with new and reloads. could this be an extractor being to tight. This is only on my PT1911, thanks Trick1911

[rdoggsilva]

I have notice the same thing on my brass. But do not know what causes it. I can still reload my brass so not so worried about it. And not had any problems with the pistol.

[niemi24s]

Is this indentation on the case head (where the headstamp data is) or the extraction groove?

[Joni Lynn]

I think it's from the area that is cut out of the breech face for the ejector.
Some guns do have a shelf on the breech face though which would also cause that.

[wichaka]

Yep, that would be my first guess. Look at the breech face of the gun, it probably has bit of a shelf on the face that's causing it.

[niemi24s]

It is not uncommon for a 1911 breech face to have surface machining mismatch. This mismatch shows up as a vertical step extending downward from the top inside edge of the left hand breech face guide block - where the left rear corner of the barrel hood fits.

Don't think it really hurts anything and is another way to positively ID your brass at the range.

[Ken Grant]

On my pistols the mark is made by the ejector when it hits the casehead.
Put an index mark on an unfired rd.,fire it and see where the casehead mark is in relation to the index mark.
I put the rd. in with the index mark up.

[Joni Lynn]

The step on the breechface of my first GCNM is so bad it's more like a real step. I had it reduced, it was almost ruining brass. Nothing quite like a two step breech face that doesn't even know how to dance.