.277 | 140gr | Winchester FailSafe

About this bullet

.277 | 140gr | Winchester FailSafe is a bullet made by Winchester. At 140 gr (9.1 g) and a diameter of 0.277'' (7.04 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.322 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. A twist rate of 1:11.0 is recommended for stable flight; slower twists can under-stabilise this bullet. We currently list 878 load recipes across 11 calibers for this bullet.

Most popular calibers for this bullet

Load data for .277 | 140gr | Winchester FailSafe bullet is available in the following calibers:

• .27 Nosler
• .270 Sherman
• .270 Weath. Mag.
• .270 Win.
• .270 Win. Ackley Improved
• .270 WSM
• .277 Fury
• .277 Fury Commercial
• 6.8 mm Rem. SPC
• 6.8 Western
• 7 x 44 Penna

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.