The red-tipped .30-06 Springfield cartridge has a ballistic tip.
A ballistic tip bullet is a hollow-point bullet that has a plastic tip on the end of the bullet itself. This improves external ballistics by streamlining the bullet, allowing it to slice through air more easily, and improves terminal ballistics by allowing the bullet to act as a JHP on impact.
As a side effect, it also feeds better in weapons that have trouble feeding rounds that are not FMJ rounds.