Help read this brass!

[maccrazy2]

Hey guys, I was getting ready to clean my brass and found these 6 cases from a batch of 100 that I shot in my ruger 77 stainless varmit rifle. I have been running the same loads in the gun since new. 80gr nozler balistic tips with 38.4gr of imr4895 and win primers loaded in win brass. I looked in the chamber and do not see any sign of corresponding marks. They are all exactly the same marks on 5 pieces and one has the longer mark on the right and one odd mark running horizontal above it.
The brass was on it's 3rd firing. I had necksized the brass when loading but I am oldmost positive these are from firing not loading. I did check the sizer and seating dies for forign material and did not find anything. These were loaded on a single stage press and I don't think I would have missed these marks while loading. Any thoughts?

 

[Topstrap]

Re: Help read this brass!

Looks like ya got something up in your chamber, possiblily a piece of the case mouth that came off a case. Shine a light up in there and hopefully it'll come out.

Topstrap

 

[Stratmeister]

Re: Help read this brass!

Clean the chamber and shoot again...

 

[BHP9]

Re: Help read this brass!

Before you clean, examine with a bore light.

 

[Varmint_Poontang]

Re: Help read this brass!

Looks Arabic

 

[esorensen]

Re: Help read this brass!

Maybe something on the ramp too.

 

[Jasmck]

Re: Help read this brass!

Probably brass shaving in the chamber.

 

[Victor N TN]

Re: Help read this brass!

I would agree with something in the chamber. After you clean the bore of the rifle you need to clean the solvent and crud from the chamber. I use a 45 caliber cotton mop with a large cleaning patch wrapped around it.

 

[longrange10]

Re: Help read this brass!

ive seen the same marks on my 22-250 cases it happens when you seat your bullet a little shaving of copper is sitting around the case mouth and comes off in your chamber, just chamfer the inside of your case mouth before loading and that wont happen....

 

[maccrazy2]

Re: Help read this brass!

Thanks guys. I looked in the chamber again and nothing there. I suspect there were a couple shavings that got stuck in the chamber area for 6 shots then worked their way out. I just figured with as snug as the fireformed brass chambers I would have felt something in the chamber when trying to close the bolt but, I guess not. I will make sure to chamfer the brass a little more on the next loads.

 

[DRAM40A1]

Re: Help read this brass!

You can see whatever was there, moved towards the neck shoulder junction on the case to the far right.

 

[Mudcat-NC]

Re: Help read this brass!

Copper jacket shavings off your bullets. Be sure to chamfer your case mouths before you load the casings. The Sinclair VLD chamfer tool on a cordless drill is the ticket. Hold casing over a garbage can and zap it. Done, ready to load, no damage to bullet, no casings in the chamber! Perfect.

John