I believe you are correct FT that it is real, the weight is right, it's non magnetic My suspicion as to is validity is just a gut feeling. It just doesnt feel right. It would help if I could find this particular coin with the word copy in the same location on the net but all I've been able to find so far is the HM 1/10 ounce with the word copy in the same location as the one ounce round.
I have a bicentennial half I swore was silver when I seen the edge, got excited when I saw it was bicentennial because I dont have one, yet it didnt feel "right" to me in my fingers. Not having a mint mark and underweight on the half sealed the deal.