POLYCASE INCEPTOR ARX
THE ARX BULLET is a relative newcomer, having been introduced in 2014. Made from a blend of polymer and metal, the ARX is a non-expanding bullet that achieves its terminal ballistics thanks to the spiraled grooves cut into the nose of the bullet.
When the bullet encounters soft tissue, the small channels funnel the tissue—which reacts like a fluid at these velocities—constricting it and ejecting it to the sides, creating a nasty wound channel. (polycaseammo.com)