.280 Remington
{{Short description|US rifle cartridge}}
{{Infobox firearm cartridge
| name = .280 Remington
| image = 280 Remington.JPG
| image_size = 300px
| caption =
| origin = USA
| type = Rifle
| service =
| used_by =
| wars =
| designer = Remington
| design_date = 1957
| manufacturer = Remington
| production_date = 1957–present
| number =
| variants = .280 Ackley Improved
| is_SI_specs =
| parent = .30-06 Springfield
| case_type = Rimless, bottleneck
| bullet = .284
| neck = .315
| shoulder = .441
| base = .470
| rim_dia = .473
| rim_thick =
| case_length = 2.540
| length = 3.330
| case_capacity = 67.9
| max_pressure = 58740
| pressure_method = C.I.P.
| max_pressure2 = 60000
| pressure_method2 = SAAMI
| max_cup = 50,000
| rifling = 1 in {{convert|10|in|mm|abbr=on}}
| primer = Large rifle
| is_SI_ballistics =
| bw1 = 120
| btype1 = SP
| vel1 = 3112
| en1 = 2581
| bw2 = 140
| btype2 = HP
| vel2 = 2839
| en2 = 2506
| bw3 = 154
| btype3 = SP
| vel3 = 2825
| en3 = 2730
| bw4 = 168
| btype4 = HPBT
| vel4 = 2723
| en4 = 2767
| bw5 = 175
| btype5 = SP
| vel5 = 2681
| en5 = 2794
| test_barrel_length = {{cvt|24|in}}
| balsrc = 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.
History
Having been released 32 years after the .270 Winchester, it had somewhat unspectacular sales. Remington renamed the cartridge in late 1978 to 7mm-06 Remington. but just before the end of the year, they renamed it again, calling it the 7 mm Express in an attempt to increase sales. This resulted in people confusing it with the 7 mm Remington Magnum, and Remington changed the name back to .280 in 1981.[http://www.outdoorlife.com/articles/guns/rifles/2007/09/versatile-280 The Versatile 280 at Outdoor Life] By Jim Carmichel, September 18, 2007
Specifications
The .280 is based on the 30-06 necked down to accept 7 mm (.284 in) bullets, with the neck moved forward .050 in (1.27mm). The neck was deliberately moved forward to prevent chambering in a .270 Winchester rifle, as firing a .280 round in a .270 rifle could cause the projectile to get stuck in the barrel or rupture the barrel due to excessive pressure.{{cite news |last1=Wu |first1=Vivien |title=.280 Remington |url=https://www.sporting-rifle.com/features/280-remington/ |access-date=23 September 2021 |work=Sporting Rifle |date=16 May 2015}}
.280 Remington vs .270 Winchester
The .280 Remington is capable of generating slightly higher velocities in heavier bullet weights (150 grains and above) than the .270 Winchester due to a marginally greater case capacity. However, the ballistic coefficient of equal-weight bullets favors 6.8mm (.277) caliber bullets over 7mm (.284) bullets of similar design. In the heavier bullets (150 grains and above) of similar design, the .280 Remington has a slight edge in muzzle energy.
With equal-weight bullets of similar design, the .270 Winchester surpasses the .280 Remington's long-range velocity and energy due to the 270's higher ballistic coefficient according to Federal's ammunition catalog. There are also many more factory loads available for the .270 Winchester over the .280 Remington at a lower price point due to the .270's much greater popularity.
Renowned for being a strong advocate of the .270 Winchester, gun writer Jack O'Connor's last rifle was a Ruger M77 restocked by Alvin Biesen but this time chambered in .280 Remington, an example of the regard O'Connor had for the cartridge.{{Cite web |last=Card |first=James |date=July 3, 2012 |title=Classic Guns: Jack O'Connor's Last Rifle, the Ruger M77 |url=https://gundigest.com/more/classic-guns/classic-guns-jack-oconnors-last-rifle-the-ruger-m77 |website=gundigest.com}}
.280 vs .30-06
The .280 Remington is capable of developing energy nearly equal to the .30-06 Springfield, but with lighter bullets having a better ballistic coefficient. The .30-06 produces more energy than the .280 with bullets heavier than 180 grains, though .284" 175-grain bullets have a high sectional density of .310, compared to the 30-06 180-grain bullet with a moderate sectional density of .271. The .280 is suitable for hunting any game in North America with good shot placement.
SAAMI pressure limit for the .280 Remington is set at 60,000 PSI, 50,000 CUP.
Most American rifle and ammunition manufacturers catalogue the .280 Remington.
The .30-06 is substantially more popular and manufacturers thus offer a much greater selection of loads at a substantially lower price point.
While it is true that a .280 Remington case can be formed from a .30-06 Springfield case, the case length of a .30-06 is {{convert|2.494|in|mm|order=flip}} while the case length of a .280 is {{convert|2.540|in|mm|order=flip}}, the same as a .30-03 Springfield. However, resized cases often stretch making up the difference in length and "The slight difference in length of reformed cases doesn't make any practical difference." Speer Reloading Manual Number Ten (1979), p. 182
.280 Ackley Improved
{{Excerpt|.280 Ackley Improved}}
See also
References
{{Reflist}}
{{Remington Cartridges Firearms}}
{{.30-03 Springfield}}
{{DEFAULTSORT:280 Remington}}