.375 | 285gr | Speer Grand Slam

About this bullet

.375 | 285gr | Speer Grand Slam is a bullet made by Speer. At 285 gr (18.5 g) and a diameter of 0.375'' (9.52 mm) it suits handloads where bullet weight and barrel length have to be matched carefully. Its G1 ballistic coefficient of 0.354 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 518 load recipes across 21 calibers for this bullet.

Most popular calibers for this bullet

Load data for .375 | 285gr | Speer Grand Slam bullet is available in the following calibers:

• .369 N.E. Purdey
• .375 Blaser Mag.
• .375 Chey Tac
• .375 EnABELR
• .375 Fl. Mag. N.E.
• .375 Fl. N.E. 2 1/2''
• .375 H&H Mag.
• .375 Hoelderlin
• .375 R Hoelderlin
• .375 R Verney-Carron
• .375 Raptor
• .375 Rem. Ultra Mag.
• .375 Ruger
• .375 SOCOM
• .375 Swiss P
• .375 Weath. Mag.
• .375 Whelen
• .375 Win.
• .378 Weath. Mag.
• 37XC
• 9.5 x 66 SE v. Hofe

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.