Had that happen on a previously never fired Rem 700 243 with Prvi ammo. My reloads loaded and shot fine. Here is some good readily available fairly priced 280 rem ammo. They are good to go - I got a case from them.
https://ammoshoponline.com/product/in-stock-new-brass-280-rem-160-gr-tipstrike-norma-qty-20/
