Spent case damage

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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Frysl
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Spent case damage

Post by Frysl » Tue Dec 29, 2020 6:37 pm

Hello all,
Since purchasing an upper, I’ve notice that all my brass is hitting the deflector with enough force the dent the case mouth. Normal, or is this telling me something? Anything to be concerned about?
Thanks
Steve

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20X11
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Re: Spent case damage

Post by 20X11 » Tue Dec 29, 2020 8:09 pm

Perfectly normal and expected.

pj-schmidt
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Re: Spent case damage

Post by pj-schmidt » Tue Dec 29, 2020 8:13 pm

20X11 wrote:
Tue Dec 29, 2020 8:09 pm
Perfectly normal and expected.

Frysl
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Re: Spent case damage

Post by Frysl » Tue Dec 29, 2020 8:48 pm

Thanks!

Sig220
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Re: Spent case damage

Post by Sig220 » Tue Dec 29, 2020 9:54 pm

If it bothers you, a piece of self sticking velcro or a pad used to keep cabinets from slamming stuck at the right point on the upper will soften the blow of the collision!

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plant.one
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Re: Spent case damage

Post by plant.one » Thu Dec 31, 2020 3:04 pm

Sig220 wrote:
Tue Dec 29, 2020 9:54 pm
If it bothers you, a piece of self sticking velcro or a pad used to keep cabinets from slamming stuck at the right point on the upper will soften the blow of the collision!
^^^^ this


although do note.. it wont eliminate all the case mouth denting, but it'll decrease it, often by quite a bit
Reloading info shared is based on experiences w/ my guns. Be safe and work up your loads from published data. Web data may not be accurate/safe.
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noname
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Re: Spent case damage

Post by noname » Thu Dec 31, 2020 4:53 pm

Count the dents and subtract one (the factory load). That is roughly how many times that piece of brass has been loaded and fired from an AR :lol: Bolt guns mess up this math.
Previously known as hardcase. Moved lost internet connection for 1+ years.

TRshootem
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Re: Spent case damage

Post by TRshootem » Fri Jan 01, 2021 1:40 am

The stick on inner tube patches work very well, cut to size, peel and stick. Hundreds of rounds later it still hangs on :P

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