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Howa M1500 Long Action Barrelled Action – .300 Winchester Magnum | 24″ Blued Heavy Barrel | Threaded with Cap

The Howa M1500 .300 Winchester Magnum Long Action Barrelled Action with 24″ blued heavy barrel is a Japanese-manufactured precision platform built on the M1500 long action receiver, chambered in one of the world’s most proven and versatile big-bore magnum cartridges. Featuring a cold-hammer-forged blued steel heavy barrel threaded with thread cap, HACT two-stage trigger, and three-position safety, the Howa M1500 .300 Win Mag barrelled action is the ideal foundation for a long-range hunting rifle, precision magnum chassis build, or extended-range competition platform in a cartridge trusted by hunters, military snipers, and long-range shooters worldwide for decades.

Note: This is a barrelled action only. No stock is included. The .300 Win Mag is chambered on the M1500 long action receiver. Compatible with Howa M1500 long action stocks, chassis systems, and aftermarket solutions from MDT, KRG, and others. Purchase of firearms in South Africa requires a valid firearms licence and compliance with the Firearms Control Act.

Why the Howa M1500 .300 Win Mag Long Action Barrelled Action is the Big-Bore Long-Range Build Platform

.300 Winchester Magnum — The World Standard Big-Bore Long-Range Cartridge
The .300 Winchester Magnum has been one of the world’s most widely used long-range hunting and precision cartridges since its introduction in 1963, trusted by hunters pursuing dangerous game, military and law enforcement snipers, and long-range precision shooters across all disciplines. The .300 Win Mag drives 180 to 220 grain projectiles at velocities between 2,850 and 3,000 fps, delivering exceptional retained energy, flat trajectory, and wind resistance at distances beyond 1,000 metres that make it the benchmark against which other belted magnums are measured. Ammunition, components, and reloading data for the .300 Win Mag are available worldwide in greater variety than any other belted magnum cartridge.

Long Action Receiver — Correctly Sized for the .300 Win Mag
The Howa M1500 .300 Win Mag is chambered on the M1500 long action receiver, which provides the correct bolt travel and magazine length for the .300 Win Mag’s belted magnum case. The M1500 long action brings the same machined receiver quality, forged bolt, M16-style extractor, and 90-degree bolt throw as the short action platform, scaled for the larger magnum case dimensions.

Cold-Hammer-Forged 24″ Blued Heavy Barrel — 1:10″ Twist Rate
The Howa M1500 .300 Win Mag 24″ heavy barrel is cold-hammer-forged steel in a heavy varmint contour, finished in matte blue. The 24″ length maximises muzzle velocity for the .300 Win Mag’s large propellant capacity, extracting the full ballistic potential of the cartridge for long-range work. The heavy barrel profile improves stiffness, heat management during extended shooting sessions, and suppressor stability when running suppressed. The 1:10″ twist rate stabilises the full range of .300 Win Mag projectiles from 150 to 220 grains.

Threaded Muzzle with Thread Cap — Suppressor and Muzzle Brake Ready
The Howa M1500 .300 Win Mag barrel is threaded at the muzzle with a thread cap included, allowing direct fitment of suppressors, muzzle brakes, and compensators without gunsmithing. A muzzle brake is particularly effective on the .300 Win Mag, significantly reducing felt recoil and enabling faster target reacquisition for follow-up shots on dangerous game and in long-range competition.

HACT Two-Stage Trigger — Precision-Focused Factory Trigger
The Howa M1500 barrelled action includes the HACT (Howa Actuator Controlled Trigger) two-stage trigger system. Self-contained and attached to the receiver via a single Allen screw, the HACT delivers a clean, predictable two-stage pull with a defined take-up and crisp break, adjustable for pull weight to suit hunting or long-range precision use.

Three-Position Safety for Safe Field Handling
The Howa M1500 three-position safety provides forward for fire, middle for bolt operation with trigger locked, and rear for full bolt and trigger lock during carry — essential for safe handling in dangerous game hunting environments.

Sub-MOA Accuracy Guarantee
Howa guarantees the M1500 barrelled action to produce sub-MOA groups with appropriate factory ammunition, reflecting the tight dimensional tolerances and precise chambering and headspacing applied at the Japanese factory.

Howa M1500 .300 Win Mag 24″ Blued Heavy Barrel Long Action Barrelled Action Full Specifications

• Model: Howa M1500 Long Action Barrelled Action
• Calibre: .300 Winchester Magnum
• Action: Bolt action, long action
• Barrel Length: 24 inches
• Barrel Profile: Heavy barrel
• Barrel Construction: Cold-hammer-forged steel
• Barrel Finish: Matte blue
• Twist Rate: 1:10 inches
• Muzzle Thread: Threaded with thread cap included
• Trigger: HACT two-stage, adjustable
• Safety: Three-position
• Bolt: Forged, two locking lugs, 90-degree throw, M16-style extractor
• Magazine: Internal, 3+1 capacity (stock/chassis dependent)
• Stock: Not included (barrelled action only)
• Accuracy Guarantee: Sub-MOA
• Origin: Japan
• Ideal For: Long-range hunting, dangerous game, precision chassis builds, PRS magnum class, suppressed use
• Brand: Howa