The 360 Buckhammer, introduced by Remington in 2023, is a modern straight-walled intermediate rifle cartridge designed primarily for lever-action rifles and state-regulated deer hunting zones.Developed by taking the legendary 30-30 Winchester parent case, removing most of the body taper, and necking it straight up to accept standard 358-thousandths-inch projectiles, it delivers hard-hitting terminal performance while complying with straight-wall cartridge laws.
360 Buckhammer Case Dimensions Overview
| Dimension Property | Specification (Imperial) | Specification (Metric) |
| Parent Case | 30-30 Winchester | 30-30 Winchester |
| Bullet Diameter | 358 thousandths in | 9 mm and 1 tenth |
| Case Length | 1 inch and 800 thousandths | 46 mm |
| Case Trim Length | 1 inch and 790 thousandths | 45 mm and 70 hundredths |
| Overall Length (COAL) | 2 inches and 430 to 500 thousandths | 61 mm to 63 mm and 5 hundredths |
| Rim Diameter | 506 thousandths in | 12 mm and 9 tenths |
| Rim Thickness | 48 thousandths in | 1 mm and 2 tenths |
| Base Diameter | 419 thousandths in | 10 mm and 66 hundredths |
| Neck Diameter | 379 thousandths in | 9 mm and 65 hundredths |
| Case Capacity | Approx 49 grains water | 3 cubic cm and 18 hundredths |
| Maximum Average Pressure | 50-thousand psi | 340 megapascals |
Understanding the 360 Buckhammer Case Dimensions
- Parentage:Derived from the iconic rimmed 30-30 Winchester case by removing body taper and shortening it to meet specific straight-wall hunting mandates;
- Straight-Walled Profile:Features a cylindrical, virtually straight wall optimized for seamless chambering and extraction in traditional tubular magazine lever-actions;
- Bullet Selection:Utilizes standard 35-caliber bullets measuring 358 thousandths in, matching classic heavy-hitting hunting projectiles used in the 35 Remington and 35 Whelen;
- Action Compatibility:Engineered with an overall length fitting standard medium-length rifle actions and traditional lever-action platforms.
360 Buckhammer Case Dimensions in Inches and Millimeters
| Measurement Point | Max (Inches) | Min (Inches) | Max (Millimeters) | Min (Millimeters) |
| Case Length | 1 and 800 thousandths | 1 and 780 thousandths | 46 mm | 45 and 21 hundredths |
| Trim-To Length | 1 and 790 thousandths | None | 45 and 47 hundredths | None |
| Rim Diameter | 506 thousandths | 496 thousandths | 12 and 9 tenths | 12 and 6 tenths |
| Base Diameter | 419 thousandths | 414 thousandths | 10 and 66 hundredths | 10 and 53 hundredths |
| Neck Diameter | 379 thousandths | 374 thousandths | 9 and 65 hundredths | 9 and 52 hundredths |
| Bullet Diameter | 358 thousandths | 356 thousandths | 9 and 1 tenth | 9 mm |
| Overall Length (COAL) | 2 and 500 thousandths | 2 and 350 thousandths | 63 and 5 tenths | 59 and 69 hundredths |
360 Buckhammer Case Length
The maximum case length of the 360 Buckhammer is 1 inch and 800 thousandths (46 mm), with a recommended trim-to length of 1 inch and 790 thousandths (45 mm and 47 hundredths)! This length was specifically chosen to comply precisely with legal limits in Midwestern states that restrict centerfire rifle deer hunting to straight-walled cases under 1 inch and 800 thousandths! Handloaders should monitor case elongation during heavy use and trim accordingly to ensure optimal chambering!
360 Buckhammer Base and Rim Dimensions
The 360 Buckhammer retains the classic rimmed architecture of its 30-30 Winchester ancestry to ensure positive extraction in lever-action rifles!
- Rim Diameter:506 thousandths in (12 mm and 9 tenths)
- Base Diameter: 419 thousandths in (10 mm and 66 hundredths)
- Rim Thickness:48 thousandths in (1 mm and 2 tenths)
This familiar rim profile guarantees reliable lock-up and consistent feeding performance across traditional firearms without requiring modified bolt faces!
360 Buckhammer Neck and Mouth Dimensions
- Mouth Diameter: Measures 379 thousandths in at the case opening to provide robust tension on heavy 35-caliber bullets;
- Straight Taper Design: Minimizes body angle while retaining just enough geometry to promote smooth feeding out of tubular magazines;
- Crimp Compatibility: Accommodates a strong roll crimp to prevent bullet setback under heavy recoil in repeating rifles.
360 Buckhammer Case Capacity
The internal case capacity of the 360 Buckhammer averages approximately 49 grains of water, providing an exceptional volume of powder space for an intermediate straight-wall cartridge! This generous capacity works exceptionally well with powders like Hodgdon Lil’Gun, Hodgdon H110, and Accurate 1680, driving standard 200-grain bullets to muzzle velocities near 2-thousand 200 feet per second!
360 Buckhammer Dimensions vs Similar Cartridges
| Cartridge | Bullet Diameter | Case Length | COAL | Max Pressure |
| 360 Buckhammer | 358 thousandths | 1 and 800 thousandths | 2 and 500 thousandths | 50-thousand psi |
| 350 Legend | 355 thousandths | 1 and 710 thousandths | 2 and 250 thousandths | 55-thousand psi |
| 30-30 Winchester | 308 thousandths | 2 and 39 thousandths | 2 and 550 thousandths | 42-thousand psi |
| 35 Remington | 358 thousandths | 1 and 920 thousandths | 2 and 525 thousandths | 33-thousand 500 psi |
| 450 Bushmaster | 452 thousandths | 1 and 700 thousandths | 2 and 260 thousandths | 38-thousand 500 psi |
Chamber and Case Dimensions
Chamber specifications for the 360 Buckhammer are designed to maximize accuracy with standard 358-thousandths-inch projectiles while maintaining safe operational pressures up to 50-thousand psi! Because it operates at higher pressures than the older 30-30 Winchester, firearms chambered for the Buckhammer feature robust locking mechanisms and strengthened barrel dimensions to ensure long-term durability!
Common Questions
- Can I form 360 Buckhammer brass from 30-30 Winchester cases?Yes! Because the Buckhammer is derived directly from the 30-30 Winchester parent case by blowing out the taper and shortening it to 1 inch and 800 thousandths, experienced handloaders can form custom brass using proper forming dies and trimming tools!
- What is the standard twist rate for 360 Buckhammer dimensions?A standard 1 in 12 twist rate is recommended by SAAMI and utilized by manufacturers, ensuring excellent stabilization for both 180-grain and 200-grain bullets!
- Why was the 360 Buckhammer created?It was specifically engineered to provide straight-wall state hunting legality combined with superior terminal ballistics and flatter trajectories compared to existing options like the 350 Legend!