Ross Rifle Mk III Sniper
Ross Rifle Company · Sniper Rifle · Out Of Production · 1910
Also known as: Ross Mk III Sniper, Ross Sniping Rifle, Canadian Ross Sniper
Overview
The Ross Rifle Mk III Sniper was the premier sniping weapon of the Canadian Expeditionary Force during World War I, renowned for exceptional accuracy despite the base rifle's notorious unreliability in trench conditions. Featuring a unique straight-pull bolt action and a long 30.5-inch barrel, the Ross was fitted with either a 5.2x Warner & Swasey prismatic telescopic sight or a Winchester A5 scope. While the standard Ross was withdrawn from front-line infantry service in 1916 due to chronic jamming issues with mud and British-manufactured .303 ammunition, snipers retained the rifle throughout the war for its superior accuracy, which exceeded that of the replacement Lee-Enfield.
Specifications
| Weight (empty) | 4480 g (158.0 oz) |
| Weight (loaded) | 4700 g (165.8 oz) |
| Overall Length | 1283 mm (50.51") |
| Barrel Length | 775 mm (30.51") |
| Action Type | Bolt Action |
| Firing Mechanism | Striker Fired |
| Trigger Type | Two Stage |
| Magazine Capacity | 5 rounds |
| Magazine Type | Internal |
| Muzzle Velocity | 792 m/s (2598 fps) |
| Muzzle Energy | 3540 J (2611 ft·lbf) |
| Effective Range | 800 m (875 yd) |
| Maximum Range | 2500 m (2734 yd) |
| Barrel Rifling | Left Hand |
| Rifling Twist | 254 mm (10.00") |
| Number of Grooves | 4 |
| Frame Material | Steel |
| Barrel Material | Steel |
| Stock Material | Wood |
| Finish | Blued |
Calibers
- .303 British · primary — also known as .303 Mk VII, 7.7x56mmR, .303 Enfield
Features
- Firing modes: Manual
- Feed systems: Internal Box Magazine, Stripper Clip
- Safety mechanisms: Bolt Sleeve Safety
- Features: Straight Pull Bolt Action, Warner Swasey 5-2x Scope, Exceptionally Accurate, Long Barrel, Harris Controlled Platform
Variants
- Ross Rifle Mk III (Standard) — Standard Infantry
- Ross Mk III with Winchester A5 Scope — Alternate Scope
Service history
Operators
- Canadian Expeditionary Force · adopted 1910 · as Ross Rifle Mk III Sniping
- British Army
Conflicts
- World War I (Western Front) (1915-1918)
- Second Battle of Ypres (1915)
- Battle of the Somme (1916)
- Battle of Vimy Ridge (1917)
Production
Estimated total produced: 1,407 · Production years: 1910-1916
Approximately 1,407 sniper-configured Ross rifles were produced: 500 with Warner & Swasey 5.2x scopes and 907 with Winchester A5 scopes. Total Ross Mk III production (all variants) was approximately 342,040 rifles.
Origin
Country of origin: Canada
Designer: Sir Charles Ross
Discontinued: 1918
Notes
The Ross Rifle's straight-pull bolt was theoretically faster to operate than a conventional turn-bolt, but its tight chamber tolerances made it extremely sensitive to dirty or slightly oversized ammunition. This was catastrophic for infantry use in the trenches but irrelevant for snipers who carefully selected their ammunition and kept their weapons meticulously clean. Two scope configurations were used: approximately 500 rifles received the Warner & Swasey 5.2x prismatic sight, and 907 rifles were fitted with Winchester A5 telescopic sights. The Ross remained in Canadian sniper service until the end of WWI despite the infantry having switched to the Lee-Enfield in 1916.
Background
Francis Pegahmagabow, an Ojibwe soldier of the Canadian Expeditionary Force and the most decorated Indigenous soldier in Canadian military history, is credited with 378 confirmed kills during WWI - making him the deadliest sniper of the First World War. He fought at Ypres, the Somme, Passchendaele, and the Battle of Amiens, earning the Military Medal three times. Canadian snipers using the Ross rifle developed a fearsome reputation on the Western Front, with their exceptional marksmanship helping to establish the sniper as a decisive battlefield asset.