https://greenacressporting.com/product/norma-tipstrike-ammunition-280-remington-160-grain-polymer-tip-flat-base-box-of-20/
Can't beat this. I've bought this to use as practice and form loads in my 280ai
Try scheels, or sportsmans warehouse they are close to that part of town. Brunos should have sone but they are in north Phoenix are only open till noon today.