XXL Reloading
Speer 140gr Grand Slam reloading bullet

.264 | 140gr | Speer Grand Slam

Our reloading data for the .264 | 140gr | Speer Grand Slam bullet covers a total of 41 suitable calibers and 1000 load recipes

The Speer Grand Slam bullet is expertly engineered for hunters seeking reliable performance on big game. This bullet features a bonded core design, effectively fusing the lead core to the copper jacket, which significantly enhances weight retention and promotes uniform expansion even at high velocities. The Grand Slam's jacket is tapered and its internal flutes are meticulously designed to ensure controlled expansion without sacrificing penetration capabilities, making it adept at delivering deep, lethal wounds on large and tough-skinned game. Its sturdiness allows hunters to target species such as elk, moose, and bear, while offering optimal performance in a variety of calibers such as .30-06 Springfield and .300 Winchester Magnum. Reloaders will appreciate the consistent performance, which is conducive to precise handloading. The robust construction of the Grand Slam provides excellent terminal ballistics with minimal jacket separation, ensuring the bullet retains a high percentage of its original weight for maximum energy transfer. This makes it an ideal choice for those pursuing big game where dependable terminal performance is paramount.

About this bullet

.264 | 140gr | Speer Grand Slam is a bullet made by Speer. At 140 gr (9.1 g) and a diameter of 0.264'' (6.71 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.498 drives velocity retention and wind drift downrange — higher values mean a flatter trajectory at distance. A twist rate of 1:12.0 is recommended for stable flight; slower twists can under-stabilise this bullet. We currently list 1000 load recipes across 41 calibers for this bullet.

Most popular calibers for this bullet

CaliberLoad recipes
.264 Leroy N.E.143
6.5 Creedmoor142
6.5 PRC124
6.5 mm Lahoz110
6.5-284 Norma100

Load data for .264 | 140gr | Speer Grand Slam bullet is available in the following calibers:

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.