"A USA" and HPR?

Found 2 new cases, at least to me, at the range today. One is a .45ACP with an (A USA 45 AUTO) headstamp, and a .380 marked (HPR 380 AUTO).
I seem to recall the A USA .45 being discussed before, but a Search didn’t bring it up. Can anyone help provide an origin for these two?

A USA is a new Armscor headstamp (as of a few years ago), and HPR is HPR ammo: http://www.hprammo.com