.280 Remington

.280 Remington
Type	Rifle
Place of origin	USA
Production history
Designer	Remington
Designed	1957
Manufacturer	Remington
Produced	1957–present
Variants	.280 Ackley Improved
Specifications
Parent case	.30-06 Springfield
Case type	Rimless, bottleneck
Bullet diameter	.284 in (7.2 mm)
Neck diameter	.315 in (8.0 mm)
Shoulder diameter	.441 in (11.2 mm)
Base diameter	.470 in (11.9 mm)
Rim diameter	.473 in (12.0 mm)
Case length	2.540 in (64.5 mm)
Overall length	3.330 in (84.6 mm)
Case capacity	67.9 gr H2O (4.40 cm3)
Rifling twist	1 in 10 in (250 mm)
Primer type	Large rifle
Maximum pressure (C.I.P.)	58,740 psi (405.0 MPa)
Maximum pressure (SAAMI)	60,000 psi (410 MPa)
Maximum CUP	50,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy 120 gr (8 g) SP 3,112 ft/s (949 m/s) 2,581 ft⋅lbf (3,499 J) 140 gr (9 g) HP 2,839 ft/s (865 m/s) 2,506 ft⋅lbf (3,398 J) 154 gr (10 g) SP 2,825 ft/s (861 m/s) 2,730 ft⋅lbf (3,700 J) 168 gr (11 g) HPBT 2,723 ft/s (830 m/s) 2,767 ft⋅lbf (3,752 J) 175 gr (11 g) SP 2,681 ft/s (817 m/s) 2,794 ft⋅lbf (3,788 J)
Test barrel length: 24 in (610 mm) Source(s): Accurate Powder

The .280 Remington, also known as the 7mm-06 Remington and 7mm Express Remington, was introduced in 1957 for the Remington model 740, 760, 721, and 725 rifles.