Rifle used - Kimber Caprivi chambered in 458 Lott with a 24" barrel
Ammo used-
Woodleigh 500grn RNSN Weldcore
Hornady brass
Alliant RL15 (83.8grns)
Federal Gold Medal Match LRM primers
Estimated Muzzle velocity 2200-2250fps
Estimated impact velocity 2100fps
Performance from both bullets tested was virtually identical.
Penetration 31.5 inches
Expansion 0.986 Inches
Weight retention over 99%