From the Defence-blog, May 24, 2019
General Dynamics Ordnance and Tactical Systems recently displayed the new cartridges including Frangible Short-Range Training Ammunition (SRTA) rounds, Target Practice (TP), Reduced Range Ammunition (RRA), Armor-Piercing (AP) and Frangible cartridges.
It was announced in May of 2018 that the US Military had adopted the .338 Norma Mag MG.