Brass marks
- Thread starter vp6111
- Start date
just having some fun
CGN Ultra frequent flyer
Not a expert, but willing to give it a go
Pic # 1 ...could be a sharp feed ramp .. either going in or out
Pic 2 Your chamber is very rough .... I mean very rough ... I hope you do not reload
Pic 3 are you using metal mags or Plastic ???? more rough chamber
Pic # 1 ...could be a sharp feed ramp .. either going in or out
Pic 2 Your chamber is very rough .... I mean very rough ... I hope you do not reload
Pic 3 are you using metal mags or Plastic ???? more rough chamber
I think post #2 got it. With pic 2 & 3, if you are reloading or using hot factory loads, this could be a product of sticky brass and the bolt carrier group rotating to unlock lugs and eject the round with the brass following that rotaton. What does the case head and primer look like? Both my modern hunters create the 2 feed ramp marks, and if I let them get dirty, the brass will show the rub marks like pics 2 & 3. Could be a rough chamber as well, just needs some investigation to find out.
I see the same stuff during load development as I approach max. Nothing to worry about. It is pretty well unnoticeable once it goes through the SS tumbler. Mostly due to slight overgassing and "early" cycling. Some ammo will do it most will not in my experience.
Mumbles Marble Mouth
CGN Ultra frequent flyer
- Location
- Lower Mainland
Take a flash light and look at the chamber. The chamber is probably scratched all to ####.
How clean is your chamber? If it has oil on it the brass doesn't hold against the chamber wall under pressure and slips backward harder against the bolt face, putting more pressure on the lugs and making it even harder to unlock. When it does unlock you'll have more bolt speed too.
Take a brush that's tight in the chamber and brush it well, twisting radially and in and out for a few minutes with solvent and then dry it well. Then go shoot it again and see what happens. I had the same problem with a similar gun.
Take a brush that's tight in the chamber and brush it well, twisting radially and in and out for a few minutes with solvent and then dry it well. Then go shoot it again and see what happens. I had the same problem with a similar gun.
Yeah, that is definitely not normal. My brass piles itself neatly at about 4 o'clock. I don't get the neck marks you have but the case body looks similar to what I see shooting ammo at the higher end of the pressure scale.
Kamikaze11
CGN Regular
- Location
- Gatineau Qc
Stag barrel are lifetime warranty !
I had an AR with a very tight chamber. Spent brass would continually get stuck and fail to eject. My solution was to use a caliber specific chamber hone. Works great now and cycles reliably. Very similar to honing the cylinder walls on an engine. That would be the only solution I can think of short of replacing the barrel.
