I'm a big fan of Federal Premium Ammo, I'd recommend one of the following for .243

Nosler® Partition®







The Nosler Partition was one of the original Premium® big game bullets and it continues to be a standard for consistency. Designed for medium to large game animals, the partitioned copper jacket allows the top half of the bullet to mushroom, while the bottom half remains in tact. This design provides deep penetration and ultimate stopping power

or the





Barnes® Triple-Shock® X-Bullet







This non-lead performer is designed for improved expansion and deep penetration. It reduces pressure and barrel fouling while increasing accuracy and features all-copper construction for high weight retention to bring game down hard.