The 280 Remington, originally introduced as the 7mm Express Remington, is a highly efficient and versatile big game hunting cartridge created by necking down the legendary 30-06 Springfield case to accept 284-thousandths-inch bullets! Introduced by Remington in 1957, it was designed to compete directly with the 270 Winchester while offering heavier bullet weights and exceptional terminal performance on deer, elk, and medium game. By combining an efficient powder capacity with a mild recoil impulse, the 280 Remington remains a beloved classic for hunters who appreciate traditional long-action performance!
280 Remington Case Dimensions Overview
| Dimension Property | Specification (Imperial) | Specification (Metric) |
| Parent Case | 30-06 Springfield | 30-06 Springfield |
| Bullet Diameter | 284 thousandths in | 7 mm and 21 hundredths mm |
| Case Length | 2 inches and 540 thousandths | 64 mm and 52 hundredths |
| Case Trim Length | 2 inches and 530 thousandths | 64 mm and 26 hundredths |
| Overall Length (COAL) | 3 inches and 300 thousandths (Max) | 83 mm and 82 hundredths |
| Rim Diameter | 473 thousandths in | 12 mm and 1 hundredth |
| Rim Thickness | 50 thousandths in | 1 mm and 27 hundredths |
| Base Diameter | 470 thousandths in | 11 mm and 94 hundredths |
| Shoulder Diameter | 441 thousandths in | 11 mm and 20 hundredths |
| Neck Diameter | 313 thousandths in | 7 mm and 95 hundredths |
| Shoulder Angle | 17 and a half degrees | 17 and a half degrees |
| Case Capacity | Approx 70 grains water | 4 cubic cm and 55 hundredths |
| Maximum Average Pressure | 60-thousand psi | 413 megapascals |
Understanding the 280 Remington Case Dimensions
- Parentage: Derived directly from the iconic 30-06 Springfield case family, retaining its robust body taper, large rifle primer pockets, and reliable powder column design;
- Shoulder Positioning: Features a shoulder moved slightly forward compared to the 30-06 to prevent dangerous chambering in 270 Winchester rifles, while maintaining a gentle 17 and a half degree shoulder angle;
- Neck Length: Incorporates a well-balanced neck providing secure bullet tension and consistent alignment for high-BC 7mm projectiles;
- Action Compatibility: Requires a standard long-action receiver and internal magazine box to handle its maximum overall length of 3 inches and 300 thousandths!
280 Remington Case Dimensions in Inches and Millimeters
| Measurement Point | Max (Inches) | Min (Inches) | Max (Millimeters) | Min (Millimeters) |
| Case Length | 2 and 540 thousandths | 2 and 490 thousandths | 64 and 52 hundredths | 63 and 25 hundredths |
| Trim-To Length | 2 and 530 thousandths | None | 64 and 26 hundredths | None |
| Rim Diameter | 473 thousandths | 463 thousandths | 12 and 1 hundredth | 11 and 76 hundredths |
| Base Diameter | 470 thousandths | 465 thousandths | 11 and 94 hundredths | 11 and 81 hundredths |
| Shoulder Diameter | 441 thousandths | 436 thousandths | 11 and 20 hundredths | 11 and 7 hundredths |
| Neck Diameter | 313 thousandths | 308 thousandths | 7 and 95 hundredths | 7 and 82 hundredths |
| Bullet Diameter | 284 thousandths | 282 thousandths | 7 and 21 hundredths | 7 and 16 hundredths |
| Overall Length (COAL) | 3 and 300 thousandths | 3 and 150 thousandths | 83 and 82 hundredths | 80 mm |
280 Remington Case Length
The maximum case length of the 280 Remington is 2 inches and 540 thousandths (64 mm and 52 hundredths), with a recommended trim-to length of 2 inches and 530 thousandths (64 mm and 26 hundredths)! Because of its standard operating pressure limit of 60-thousand psi, brass stretching is manageable during normal firing cycles! Handloaders should still measure and trim cases periodically after multiple reloadings to ensure reliable chambering and consistent neck tension!
280 Remington Base and Rim Dimensions
The 280 Remington inherits its foundational rim and base architecture straight from the 30-06 Springfield family!
- Rim Diameter: 473 thousandths in (12 mm and 1 hundredth)
- Base Diameter: 470 thousandths in (11 mm and 94 hundredths)
- Rim Thickness: 50 thousandths in (1 mm and 27 hundredths)
This universal rim architecture guarantees flawless extraction and seamless compatibility with standard long-action bolt faces found across traditional hunting rifles!
280 Remington Shoulder and Neck Dimensions
- Shoulder Angle: 17 and a half degrees ensures smooth feeding characteristics from internal magazines under field conditions;
- Shoulder Diameter: Measures 441 thousandths in at the body-shoulder junction;
- Neck Length & Diameter: Features a robust neck with a diameter of 313 thousandths in, engineered to securely hold traditional and modern high-BC 7mm hunting bullets!
280 Remington Case Capacity
The internal case capacity of the 280 Remington averages roughly 70 grains of water, varying slightly across brass manufacturers like Remington, Nosler, and Peterson! This generous capacity pairs exceptionally well with medium-slow burning powders like Hodgdon H4831, IMR 4350, and Reloader 22, generating accurate velocities and flat trajectories ideal for open country hunting!
280 Remington Dimensions vs Similar Cartridges
| Cartridge | Bullet Diameter | Case Length | COAL | Max Pressure |
| 280 Remington | 284 thousandths | 2 and 540 thousandths | 3 and 300 thousandths | 60-thousand psi |
| 280 Ackley Improved | 284 thousandths | 2 and 525 thousandths | 3 and 330 thousandths | 65-thousand psi |
| 270 Winchester | 277 thousandths | 2 and 540 thousandths | 3 and 340 thousandths | 65-thousand psi |
| 7mm Remington Magnum | 284 thousandths | 2 and 500 thousandths | 3 and 290 thousandths | 61-thousand psi |
| 30-06 Springfield | 308 thousandths | 2 and 494 thousandths | 3 and 340 thousandths | 60-thousand psi |
Chamber and Case Dimensions
Chamber dimensions for the 280 Remington are designed to accommodate factory hunting ammunition safely while offering adequate freebore for effective bullet seating! Many factory rifles feature generous throats to ensure smooth feeding of spitzer bullets from internal magazines! Handloaders should verify their specific rifle chamber dimensions when developing custom loads to achieve maximum precision!
Common Questions
- Can I form 280 Remington brass from 30-06 Springfield brass?Yes! Because the 280 Remington is a direct necked-down version of the 30-06 Springfield with a slightly repositioned shoulder, running 30-06 brass through a full-length 280 Remington sizing die is a common and straightforward method to form custom cases!
- What is the standard twist rate for 280 Remington dimensions?A traditional 1 in 9 and a half or 1 in 10 twist rate is standard, perfectly stabilizing classic hunting bullets from 140 grains up to 160 grains!
- Does the 280 Remington fit in standard short-action rifles?No! Its overall length requires a standard long-action receiver and magazine box to cycle properly!