Adjustable Gas Block and Ding on Spent Casing

[Happy2Shoot]

Everyone

Went to the range with the new gun today, followed their break in procedure ( shoot 5 clean - 4 times). Came home did a thorough cleaning went back. Not Sub MOA but couldn't get Sub MOA with my AR in 556 that is sub MOA. Guess I wasn't holding my mouth right. Hoping I'm not going to have to go down the reloading rabbit hole!

Not sure if joking or not. A proper and consistent cheek weld is very important to accurate shooting. I always make a point to align my teeth and slightly clinch my jaw.

The new gun has an adjustable gas block which I have never had. There is a video online on how to adjust it. I have a few questions for those with more expertise than I.

1. Will the adjustment of the gas block affect accuracy?

[COLOR="#0000FF"]Not likely.
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2. How do you know if a gun is over gassed? ( I understand if under gassed it wont cycle properly)

If the brass, when ejected, is going forward it is over gassed.

3. If over gassed will it harm the rifle over time.

[COLOR="#0000FF"]Not likely. All AR's are over gassed for civilian use.
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4. See attached picture of shell casing. What is causing the small indentation.

[COLOR="#0000FF"]100% normal ejection ding from hitting the brass deflector. Have you not seen this with your 5.56 as well?
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Thanks in advance for your support and answers, I've opened up a new can of worms with this caliber and want to get the most out of it for deer and hog hunting.

Sincerely

Ranch Manager ( Chris )
P.S. I'm not a ranch manager but that title is a whole different story!

Thanks Again

I think adjustable gas blocks are really good to have for a reloader.