.458 Lott & .458 Winchester Magnum Overview
The .458 Lott is essentially a lengthened version of the .458 Winchester Magnum. While the .458 Win. Mag. performs admirably within 150 yards for Africa’s Big Five, the .458 Lott addresses any shortcomings by holding approximately 17% more powder, which helps mitigate issues caused by poorly designed ammunition.
Dangerous Game Performance
True dangerous game cartridges require large bullet diameters. Based on extensive hunting experience, bullet diameter plays a significant role in lethality. Properly constructed .458-inch bullets are highly effective—even solid, non-expanding bullets can be lethal with adequate penetration.
About the 450 gr. TSX Load
This 450 gr. TSX all-copper bullet is ideal for hunters seeking an expanding projectile that penetrates deeply enough for Cape Buffalo and similar game. Because copper bullets are longer than lead-based cup-and-core bullets of equal weight (e.g., 500 gr.), they reduce available case capacity for propellant.
However, the terminal performance of the TSX bullet more than compensates for the slight velocity loss (often 100+ fps). No other expanding bullet matches the TSX in penetration and effectiveness for its weight.
Real-World Velocities
- 2,319 fps – Customized CZ 550, 22-inch barrel
- 2,318 fps – Custom Montana Rifle Company, 22-inch barrel
