I too can confirm that the Aguila copper HV does come in a plastic bag inside the cardboard box. I have no knowledge/experience with any sort of "factory seconds" etc.

My experience with Aguila is mixed. It goes bang, is accurate enough for pistol practice. I too use CCI Standard Velocity for score in NRA Bullseye. I have shot maybe 1000 rds of various Aguila in my .22 rifles for group shooting. I find the Aguila to be so-so accuracy wise. Some of the more premium Aguilas have given me good groups (like 5 shot 1/2" 50 yards) but not consistently. And some is much worse. I have determined it's not worth purchasing as long as more proven stuff is available. That said, during the last great shortage often that was what I could find, so I bought it!

Just my experience.