Brother-in-law works all the local gun shows. While working he stays with us, as his home is about 50 miles away. To return the favor, he picks up a box of ammo for me. The last 2 times he has brought me Hornady 280 Rem 139 grn SST. Great, Hornady makes good stuff, right. Well I just went to put the 2 boxes of ammo into my MTM 100 rd. box, and I noticed that the brass was headstamped RP, not Hornady. They do have SST bullets, and looks like a factory crimp, and the primers are brass, not nickel plate. Does Hornady use Remington brass? If so, first I've heard of it. I'm not complaining, just perplexed.