So the AAC 5.56 is US made brass case 5.56x45 NATO with 55gr. FMJ. I bought some to test out because $.40/rd for US brass case is pretty good in today's market, especially when sold in 20rd boxes.
I got real curious and decided to really dive into the ammo with disassembly and component inspection, velocity data and an accuracy/precision evaluation. PDF attached with the write-up and photos. Feel free to share, just please don't repost without crediting or attributing.
TLDR - decent US made 5.56 ball for a good price
AAC 5.56 NATO - Evaluation.pdf
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