- Thread starter RaptorAddict
- Start date
Does it happen if you chamber and don’t fire?
I suspect it’s a burr in the chamber and when the case gets rotated during extraction it scratches.
Or it could be from when it’s getting flicked out the ejector pressure smacks it into a sharp lug if it’s always on the ejection port side.
A bore scope and some slow inspection would highlight the issues source
I suspect it’s a burr in the chamber and when the case gets rotated during extraction it scratches.
Or it could be from when it’s getting flicked out the ejector pressure smacks it into a sharp lug if it’s always on the ejection port side.
A bore scope and some slow inspection would highlight the issues source
I know many will cringe when I say this ... but take a look at it with a bore scope. I tend to agree with @spife7980 ... has the look of burs in the chamber. I keep that from happening by honing all new chambers before firing them. DM me if you don't know what I'm talking about, or have never honed a chamber before ... and I'll walk you through what you need, and how to do it.
It always fires and every round has the same exact marks. I’ll have to scoop it to see I guess.
Will something like this compromise the brass and cause separation? It’s not like a tear, but a fine nick really.
It’s when the brass is extracted and slaps against the action. Try to remove the sharp edges in the action. Remove the barrel and stick your finger inside the action and feel any sharp edges. Could be a burr or the action was cut so precise and not dehoned it leaves razor sharp edges.
Or what @spife7980 said. I went through the same issue, had my chamber inspected and honed but the marks still appeared. Found out it was sharp edges in the action. A little dehoning of the sharp edges inside the action and no more cut marks.
Won’t hurt the brass it will develop the cut marks all over the brass the more firings you get.
What action you using?
Or what @spife7980 said. I went through the same issue, had my chamber inspected and honed but the marks still appeared. Found out it was sharp edges in the action. A little dehoning of the sharp edges inside the action and no more cut marks.
Won’t hurt the brass it will develop the cut marks all over the brass the more firings you get.
What action you using?
Last edited:
It’s actually a Sako TRG 22 in 6.5cm. It’s been a crazy accurate beast going on 900 rounds now. This is the first I’ve seen this happen. Maybe stuck debris? Was gonna scope it or clean the bell out of the chamber with a bronze brush.
Ahh gotcha, sounds like a good idea if it just appeared after 900 rounds.
If it's something sharp enough to cause this, it's probably something that won't "clean away". I recommend honing. HERE is the 6.5mm brush I use. Don't forget the oil ... both available on Amazon.
Mark your case with a sharpie and match the mark on the action. When you cycle the case you'll have a reference point to work from.
It's not likely something in thr chamber as it should show drag marks from ejection.
You'll likely see the case slapping the action is the culprit. You can extract one and keep pressure on the case with your finger to control ejection to verify.
It's not likely something in thr chamber as it should show drag marks from ejection.
You'll likely see the case slapping the action is the culprit. You can extract one and keep pressure on the case with your finger to control ejection to verify.
