.338 | 275gr | TWENTY-NINE ERTP

About this bullet

.338 | 275gr | TWENTY-NINE ERTP is a bullet made by TWENTY-NINE. At 275 gr (17.8 g) and a diameter of 0.338'' (8.59 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.702 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. A twist rate of 1:9.5 is recommended for stable flight; slower twists can under-stabilise this bullet.

Load data for .338 | 275gr | TWENTY-NINE ERTP bullet is available in the following calibers:

• .338 Lapua Mag.
• .338 Lapua Mag. Ackley Improved
• .338 Norma 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.