AR10 putting small dents in my cases

[sansone]

New AR10, federal power-shock (blue box) very small dents 1/2" below shoulder.
The ejection is throwing brass gently about (4) o-clock which I believe is proper.
One thing I noticed is my lightly charged reloads don't dent. Ejection seems the same. This makes me think the hotter loads are over-gassing my carrier.
It's a carbine (collaps stock) with H3 buffer, heavy spring, factory set-up not a home build

 

[FlyinBryan]

i dont think its a problem. the deflector is there for that exact reason.

i cant say about 308, but in my experience federal is about as light of a case as ive found (thinner).

i could be wrong because all my experience with the ar platform has been 5.56, but ive seen the exact same thing.

 

[Z-Michigan]

That sounds normal and OK. Very small dents won't affect your ability to reload the cases. You won't get 10+ uses in a semiauto anyway.

 

[sansone]

ok thanks fellas, I want to full-length size the cases and never had dents before

for my bolties I neck-size only, but the cases are never dented

 

[sansone]

flyinBryan-
you may be right about federal being thinner, my reloaded winchester cases aren't denting.
I thought it was just because they were loaded light

 

[FlyinBryan]

try to find you some lake city demilled pull down brass. the stuff is awesome.

i iron out dents all the time. actually the ones that dont size out i fire them out.

50,000-60,000 p.s.i. dent repair.

 

[sansone]

actually the ones that dont size out i fire them out. 50,000-60,000 p.s.i. dent repair.

..good one, thanks

 

[velocette]

With respect, Federal cases are heavier / thicker than Winchester, RP, Hornady etc.
They are even heavier than GI brass!
The Fed brass may be softer, but it is definitely heavier.
Gather up your powder scale & measure for yourself.

Roger