.45 ACP Rim damage

Status
Not open for further replies.

lordpaxman

Member
Joined
Jun 4, 2011
Messages
2,405
This is range brass, I'm pretty sure it's once fired, and this damage only appears on Winchester head stamps. And, it doesn't occur on all Win .45 brass, just some.
I'm curious what others might have seen, or think this might be caused by? It's not a problem for reloading or shooting in a semi-auto, where it's a problem for me is if I use these in my 625, the deformation on the rim presses the moon clip and causes cylinder binding.
45ACP RIM DAMAGE.jpg
 
found this on the web appears u best watch closely on bullet seating
i have read that some of the 625-3's have a "tighter" tolerance chamber that my cause the ammunition to not fully seat into the chamber, sticking out the rear of the cylinder. I bought some Winchester White Box and Remington UMC 230gr. FMJ Hardball factory to try but the binding issue still occurs.

I received two batches of moon clips, fat ones and thin (.039") ones. I need to know the following:

1. Why are there two thickness moon clips available for .45ACP revolvers?

2. What company manufactures moon clips in the .039" thickness?

3. What information can be offered to sort out the ammo/clip issue.

I appreciate any information offered.

Regards,

Gregor
 
The mark is where the case smacks into the ejector. Those look fairly normal. If it causes a problem with the 625 take a file to the offending area and clean it up a bit. One or two swipes with a file will knock down any burrs.
 
Looks like extractor to me, maybe Win brass is a little softer, I have a M&P 40 that "marks" every case it shoots but never jams and cases are reusable.
 
Primers look good (not that you can depend on that in 45ACP). The mark on the head is very common on brass through a 1911, and I agree with the above that it's likely smacking something on its trip out of the gun.
 
I would guess by the shape of the ding, is it's hitting something as its being ejected. None of my 3, 45 ACP guns have a wide flat ejector. I think a shooter that was shooting Winchester brass just left the brass and his gun was marking the cases on ejection.

Sorta on the same track, my Garand with certain reloads will ding case rims much like the 45s pictured above. The brass was hitting the OP rod hump as it was ejected.
 
Looks like the base hits the front of the ejection port on the way out of a 1911. Pretty common.
 
That looks like it was fired from a 1911 that has an issue with inertia/push feeding. If you look at the other side of the rim there is probably a gash on the edge of the rim where the extractor is snapping over.

In my experience this is caused by a week magazine spring, spread feedlips, or the magazine geometry/design. Constantly push feeding like that will cause the extractor to lose tension quickly, and eventually result is failures to extract.
 
My Taurus still does this. It is as Jim said. Not bad enough for me to worry about.
My Wesson is more deftly manufactured...;)
None of it's Starline brass shows any marks what so ever.
 
As has been mentioned, the problem is the j cut, it can be seen by looking at the breech face.
I have a Dan Wesson Valor that had this problem, a machinist friend fixed it by working on it with a scraper and then a little polishing.
 
A "J Cut" is on the left side breach face of the slide where the base of the bullet slides up into when chambered. The right side has the extractor. When done right it is smooth and no marks will show up on the brass. When the 2 cuts end at different heights you end up with a mark on the brass.
 
Check your moon clips for correct thickness and be sure they aren't sprung.
 
Thanks for all the insight! If I connect with the guy whose gun does this, I’ll try to get back to this thread.
Regarding my 625, the moon clips are fine, the indentations telegraph through the rim and are enough to cause binding if I inadvertently use one (or more). I could file that down, but, it’s easier to demote these to the box that holds the reload-and-leave-behind cases.
 
Looks like where it contacted the ejector. A casepro can iron them back out.

ADE2AA6F-B24C-4279-958D-30083FF48078.jpeg

However, as you noted, not all firearms mess them up, so it might not be worth it to you.

All that said, I switched to 45 GAP brass for my moon clipped 45’s. No tools needed to moon or demoon and the small primers allow for a lighter trigger pull while retaining 100% ignition vs LP.

 
Status
Not open for further replies.
Back
Top