.458 | 400gr | Atomic 29 HP

About this bullet

.458 | 400gr | Atomic 29 HP is a bullet made by Atomic 29. At 400 gr (25.9 g) and a diameter of 0.458'' (11.63 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.363 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. A twist rate of 1:6.0 is recommended for stable flight; slower twists can under-stabilise this bullet. We currently list 184 load recipes across 6 calibers for this bullet.

Most popular calibers for this bullet

Load data for .458 | 400gr | Atomic 29 HP bullet is available in the following calibers:

• .450 N.E. 3 1/4''
• .450 Rigby
• .458 Lott
• .458 Win.Mag.
• .460 Steyr
• .460 Weath. Mag.

Safety notes

All load data is reference data only. Always start at the minimum charge and work up in small steps while watching for pressure signs. Never exceed the maximum charge published by the powder or bullet manufacturer.