Stag10 6.5CM - First trip to the range - chewing brass

[quikcolin]

Hey guys,

I just built a Stag10 with a 20" MRA 6.5 Creedmoor barrel, Brownell's BCG, Stag buffer spring, and Superlative adj. gas block, etc.

Took the monster to the range for break in & zero this morning and after 4 shots had the gas block adjusted to spit out brass at 3:30ish. Shooting great, but the brass looks a little rough. The bottom of each cartridge has nicks and chew marks on it from (I'm assuming) ejection?

Is there anything I can do?

Also, I removed a chambered, none fired cartridge and the bullet had a few deep scratches on it, from chambering I'm assuming? As it slides into the chamber maybe? Not sure?

See pics & Video

Is this normal?
Thx!

https://www.youtube.com/watch?v=FOt73IcVLmE

 

[Sinasta]

The marks on the bullet are from the feed ramp on the barrel extension.

 

[RangerPark]

I get the same marks at the bottom of my brass. It was worse at first but has gotten much better, about 200 rounds in.

 

[quikcolin]

I get the same marks at the bottom of my brass. It was worse at first but has gotten much better, about 200 rounds in.

Does this condition limit your ability to reload the brass?

 

[Keller]

My .308 Stag 10 takes a big ol' chunk out of the headstamp. 200 rounds in and not getting better yet.

 

[RangerPark]

Does this condition limit your ability to reload the brass?

In the long term probably. I'm running 700 or so pieces of brass so it will be a while before I've gone though enough reloads to toss the brass.

 

[greg olmstead]

I'd say you have a stiff extractor spring and it will wear in with use. The gouge is across from what looks like an ejector mark on the brass. Hornady brass is notoriously soft and I'm not surprised it's doing that with a freshly assembled rifle

 

[M1-Garand]

Not uncommon in semi auto rifles,mine are all WWII and I have to dress the base of quite a few brass in the lathe because of ejector marks