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+--- Thread: Case Swipes (/showthread.php?tid=834)
Case Swipes - JonnyArc91 - 01-10-2023
Is anybody having issues with Hornady brass and case swipes?
AR-15
29G of leverevolution 108G eld's
Also getting them with the Match Ammo, Pic is of match ammo.
[attachment=601]
RE: Case Swipes - StoneHendge - 01-11-2023
Barrel length and gas system length?
RE: Case Swipes - JonnyArc91 - 01-11-2023
(01-11-2023, 12:41 AM)StoneHendge Wrote: Barrel length and gas system length?
22” gas+1
7.5 twist
SA adjustable gas block in bleed off mode.
RE: Case Swipes - Jurive - 01-13-2023
Come to realize these rounds in a gas gun are just at that upper load limit even with factory loads. The same box of ammo will net a handful of swiped headstamps but not all. Never really figured out why. I just keep on shooting
RE: Case Swipes - Dino11 - 01-16-2023
Yeah thats barely a swipe. Can you feel it with your fingernail?
Take a look at your ejector, is the top edge of it is sharp... try rounding it off a little. Pretty common problem with the 6 ARC, especially with factory ammo.
RE: Case Swipes - alwie - 01-19-2023
(01-11-2023, 02:19 PM)JonnyArc91 Wrote:(01-11-2023, 12:41 AM)StoneHendge Wrote: Barrel length and gas system length?
22” gas+1
7.5 twist
SA adjustable gas block in bleed off mode.
What buffer weight are you using? I have the same issue in multiple 6 ARC rifles.
RE: Case Swipes - trianglevelvet - 02-03-2023
A few things:
Headspace - if the headspace is off the head of the case can hit the bolt harder making marks.
Oil in chamber- lubricant left on cases or in chamber increases bolt thrust.
Sharp ejector hole on bolt face-
If the hole has a sharp edge it can bite into the case and make a mark as it rotates when unlocking.
Overgassed system - can try to unlock the bolt before the brass has shrunk back away from chamber walls swiping the case, since the brass is still under pressure when the bolt ia turning to unlock.
Plain 'ol overpressure rounds-
If the round generates too much pressure it marks the case up.
29gr of LVR "shouldn't" be overpressure. But lot variance of the powder, bullet seating depth, neck tension (crimping), and any of the above, or a combination of two or more of the above can cause this.
You'll have to play detective to find out.