Load data for .280 Ackley Improved + 145gr Speer Grand Slam

604 suitable loads across 101 powder(s) for cartridge .280 Ackley Improved with 145gr Speer Grand Slam bullet.

The most recommended powders for this combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.

Based on SAAMI, the max. allowed case length is 2.525 in / 64.14 mm, the max. cartridge length is 3.330 in / 84.58 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Based on SAAMI, the max. allowed case length is 2.525 in / 64.14 mm, the max. cartridge length is 3.330 in / 84.58 mm, and the max. allowed pressure is 65,000 PSI / 4,482 bar.

Load Specifications

ImperialMetric

Bullet:.284 | 145gr | Grand Slam

Cartridge:.280 Ackley Improved load data

Case Length (L3):2.540" | 64.5 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.370" | 9.4 mm

Case Capacity:74 gow | 4.80 cm³

Primer Size:Large Rifle (LR)

Max. Pressure (SAAMI):65,000 psi | 4,482 bar

Barrel Length:24.0" | 610 mm

Min. Twist Rate:1:13.0

Get PRO license to unlock all data and calculators

Community Loads for .280 Ackley Improved + 145gr Speer Grand Slam

Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.

Powder	Charge (gr)	C.O.L.	Barrel Length	Velocity (fps)	Pressure (psi)

	70.0 gr	3.330"	24.0"	3104 fps	•••

Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.