.458 | 300gr | TWENTY-NINE HP

About this bullet

.458 | 300gr | TWENTY-NINE HP is a bullet made by TWENTY-NINE. At 300 gr (19.4 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 0.163 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. We currently list 12 load recipes across 10 calibers for this bullet.

Most popular calibers for this bullet

Load data for .458 | 300gr | TWENTY-NINE HP bullet is available in the following calibers:

• .45 Blaser
• .450 Marlin
• .450 N.E. 3 1/4''
• .450 Rigby
• .458 Lott
• .458 SOCOM
• .458 Win.Mag.
• .458 x 2'' American
• .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.