I have weighed a LOT of 223 brass and NEVER found even half that much variation. I would call the brass you weighed as very unusual
I weigh all my 223 brass. I can give you hundreds of cases that are over 107 gns.
Normal 223 Rem brass that is deprimed comes in around 71 to 75 gns.
I keep all brass in that range and sell the rest.
NRA Certified RSO
NwCP- Performance Isn't Optional