Scoring on brass from sharp chamber lugs

[untouchable13]

So I just finished my IRA-X build and have shot about 40 rounds through it, however I noticed on the brass, and bullet that there was a slight amount of scoring from chambering the round. Upon closer inspection I noticed that the bottom portion of the barrel was milled down so as that the bullet could feed smoothly into the chamber from the magazine, however the lug between the two milled portions had become sharp from the milling and I assume this is where the scoring is coming from.

My question is would it be unwise to file the sharp lug down slightly, so that it is not sharp. I assume this is going to happen anyways from use, but I would like to speed up the proses. Thoughts?

Also I am finding that my IRA-X is especially hard on my brass in general aside from the scoring. Is this typical for AR style rifles? I have some AR-15's but have never reloaded, so I have never looked at the brass closely.

Here are some pics of my build

These are before i mounted the Scope, Gas Block, and compensator FYI

 

[Shady_Jay]

Re: Scoring on brass from sharp chamber lugs

Beat up brass is just part of shooting a gasser.

 

[Scottmilk9]

Re: Scoring on brass from sharp chamber lugs

Don't use a file, if you were to slightly polish the feed ramps with a polishing tool or a dremel on lower(with soft polishing wheel), but please don't use a file.

 

[untouchable13]

Re: Scoring on brass from sharp chamber lugs

Thanks for the info. I will try that.

Here is a pic to illustrate the chamber!

 

[Rovieairto]

Re: Scoring on brass from sharp chamber lugs

Use a file and stone to lightly round the offending corners.
Polish if you wish.
Otherwise don't worry about it.

My brass comes out of all my AR's so nice and dent/scratch free.
The scoring/denting is mostly cosmetic, but at times it can run fairly deep.

 

[Hellbender]

Re: Scoring on brass from sharp chamber lugs

http://www.snipershide.com/forum/ubbthre...031#Post1944031

 

[untouchable13]

Re: Scoring on brass from sharp chamber lugs

Great guy's thanks for he link and the information!