.280 Riml. N.E. Ross Load Data & Reloading Guide

Rifle

Also known as: .280 Rimless N.E. Ross, 7mm Rimless N.E. Ross

About .280 Riml. N.E. Ross

The .280 Riml. N.E. Ross originated in the early 20th century, developed to provide a powerful yet manageable cartridge for sporting rifles. Named after the Canadian firearms designer Neils Eckhardt Ross, the caliber was envisioned as an alternative to the then-prevalent .303 British, aiming to deliver improved accuracy and performance for hunting purposes. Initially used in bolt-action rifles, the .280 Riml. gained popularity among hunters and marksmen alike due to its versatility and effectiveness in various shooting environments.

Key technical characteristics of the .280 Riml. include a case length of approximately 56mm and a bullet diameter of .284 inches. Designed to operate at moderate pressures, the cartridge typically features a capacity suitable for a range of bullet types. With a standard velocity around 2,600 feet per second, it delivers commendable energy on target, making it suitable for game hunting of medium to large species.

Typical bullet weights for the .280 Riml. range from 140 to 180 grains, allowing reloaders to fine-tune their loads for specific applications. The cartridge demonstrates a flat trajectory and good terminal performance, making it an excellent choice for both hunting and competitive shooting. Its ability to accommodate various bullet profiles aids in customizing loads to suit individual shooting preferences.

For reloaders, the .280 Riml. N.E. Ross offers specific advantages, including a relatively generous case capacity which can be optimized for performance. This ability to fine-tune powder types and charge weights allows reloaders to maximize precision and efficiency in their loads. Additionally, the caliber is less commonly produced than mainstream options, making handloading a more appealing choice for enthusiasts seeking customized ammunition solutions.

Technical Drawing

.280 Riml. N.E. Ross cartridge dimensions, C.I.P.L1 = 55.4 mm, L2 = 57.99 mm, L3 = 66.32 mm, L6 = 87.88 mmL1 = 55.40 mmL2 = 57.99 mmL3 = 66.32 mmL6 = 87.88 mm53.1°

Based on C.I.P., the max. allowed case length is 2.611 in / 66.32 mm, the max. cartridge length is 3.460 in / 87.88 mm, and the max. allowed pressure is 47,137 PSI / 3,250 bar.

Technical Specifications

Maximum Pressure:47137 PSI / 3250 bar
Case Volume:83 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Safety Standard:C.I.P. (Datasheet)
Bore Area:39.04 mm²
Barrel Diameter:0.287" / 7.3 mm
L1:2.181" / 55.40 mm
L2:2.283" / 57.99 mm
L3:2.611" / 66.32 mm
L6:3.460" / 87.88 mm

Start Calculating to Develop your own Load Data for .280 Riml. N.E. Ross

Use our professional ballistics calculator to develop safe and accurate load recipes for .280 Riml. N.E. Ross.

Start Calculating

Standard Load Data — .280 Riml. N.E. Ross

Select your desired cartridge and bullet weight below to access the corresponding load table. From there, you can choose any listed load recipe and transfer it directly into the ballistics calculator for further refinement, optimization, and precision tuning.

All
120 gr
128 gr
130 gr
138 gr
140 gr
145 gr
148 gr
150 gr
155 gr
158 gr
160 gr
164 gr
174 gr
Sellier & Bellot logo

.284 | 158gr | Sellier & Bellot XRG

BC G1: 0.369
41 powders216 loads
TWENTY-NINE logo

.284 | 148gr | TWENTY-NINE ERTP

BC G1: 0.45
43 powders257 loads
Federal logo

.284 | 155gr | Federal Terminal Ascent Component

BC G1: 0.586
41 powders246 loads
Barnes logo

.284 | 145gr | Barnes LRX BT

BC G1: 0.449BC G7: 0.221
46 powders275 loads
SUS-TAC logo

.284 | 145gr | SUS-TAC HPT

BC G1: 0.59
46 powders264 loads
Swift logo

.284 | 150gr | Swift Scirocco

BC G1: 0.515
41 powders240 loads
Prvi Partizan logo

.284 | 174gr | Prvi Partizan PSP BT

BC G1: 0.54
33 powders168 loads
Speer logo

.284 | 160gr | Speer Hot-Cor

BC G1: 0.504
Fox Bullets logo

.284 | 130gr | Fox Classic Hunter

BC G1: 0.33
50 powders283 loads
Hasler logo

.284 | 145gr | Hasler ARIETE

BC G1: 0.435
47 powders281 loads
Brenneke logo

.284 | 128gr | Brenneke TUG Nature Plus

BC G1: 0.278
50 powders273 loads
Nosler logo

.284 | 140gr | Nosler Expansion Tip

BC G1: 0.489
48 powders268 loads
Frontier Bullets logo

.284 | 140gr | Frontier BTSP

BC G1: 0.508
47 powders267 loads
Hornady logo

.284 | 120gr | Hornady V-MAX

BC G1: 0.365
56 powders266 loads
TWENTY-NINE logo

.284 | 138gr | TWENTY-NINE ERTP

BC G1: 0.432
45 powders261 loads
Fox Bullets logo

.284 | 145gr | Fox Classic Hunter

BC G1: 0.362
43 powders259 loads
Brenneke logo

.284 | 128gr | Brenneke TIG nature

BC G1: 0.187
47 powders254 loads
North Fork logo

.284 | 130gr | NorthFork Bonded Core

BC G1: 0.31
45 powders251 loads
Speer logo

.284 | 140gr | Speer TBBC

BC G1: 0.36
42 powders247 loads
Nosler logo

.284 | 150gr | Nosler Ballistic Tip Hunting

BC G1: 0.493
44 powders246 loads
Norma logo

.284 | 150gr | Norma Soft Point

BC G1: 0.43
43 powders237 loads
Rhino Bullets logo

.284 | 150gr | Rhino Solid Shank

BC G1: 0.417
41 powders236 loads
Swift logo

.284 | 140gr | Swift A-Frame

BC G1: 0.335
40 powders234 loads
Apex Outdoors logo

.284 | 164gr | Apex Outdoors Afterburner

42 powders232 loads

Frequently Asked Questions

The maximum pressure for .280 Riml. N.E. Ross is 47,137 psi | 3,250 bar.

.280 Riml. N.E. Ross typically uses a Large Rifle Magnum (LRM) primer.

The case capacity of .280 Riml. N.E. Ross is approximately 83 grains of water (H₂O).