rifle · bolt-action | United Kingdom
| Caliber | .303 British |
|---|---|
| Barrel | 640 mm (25.2 in) |
| Weight | 4128 g (145.6 oz, manufacturer figure) |
| Capacity | 10 rounds |
| Action | bolt-action |
| Cyclic rate | 20 rpm |
| Manufacturer | RSAF |
| Country | United Kingdom |
The Lee-Enfield No.4 Mk1 is a bolt-action rifle chambered in .303 British, built by RSAF in United Kingdom. From its 640 mm (25.2 in) barrel, PPU FMJ (174 gr FMJ) leaves the muzzle at about 2460 fps (750 m/s). Zeroed at 100 m, the bullet drops 177 mm by 200 m with 2059 J (1519 ft-lb) left. At the muzzle that is enough to defeat Drywall, Plate Glass, Pine Wood, Brick and Kevlar NIJ IIIA, and not enough for AR500 Steel. It feeds from a 10-round magazine.
Computed by the BallisticEngine engine for this barrel length, zeroed at 100 m, 15 °C, sea level, no wind.
| Distance | Drop | Velocity | Energy | Time |
|---|---|---|---|---|
| 100 m | 0 mm | 675 m/s | 2567 J | 0.14 s |
| 200 m | -177 mm | 604 m/s | 2059 J | 0.30 s |
| 300 m | -624 mm | 538 m/s | 1634 J | 0.47 s |
| 500 m | -2630 mm | 424 m/s | 1015 J | 0.89 s |
Against a semi-infinite block of each material, with PPU FMJ at the muzzle. The verdict compares the depth reached against a realistic barrier thickness.
| Material | Verdict | Depth |
|---|---|---|
| Drywall (½") | ✓ Full penetration | 454 mm |
| Plate Glass (¼") | ✓ Full penetration | 41 mm |
| Pine Wood (1") | ✓ Full penetration | 503 mm |
| Brick (4") | ✓ Full penetration | 267 mm |
| AR500 Steel (⅜") | ✗ Stopped | 7 mm |
| Kevlar NIJ IIIA | ✓ Full penetration | 14 mm |
| Load | Mass | Velocity | Type | BC (G1) |
|---|---|---|---|---|
| Federal Federal Power-Shok Rifle, 303 British, 150 Grain, Jacketed Soft Point, 2690 fps | 150 gr | 2690 fps (820 m/s) | SP | 0.410 |
| Federal Federal Power-Shok Rifle, 303 British, 180 Grain, Jacketed Soft Point, 2460 fps | 180 gr | 2460 fps (750 m/s) | SP | 0.328 |
| Hornady Hornady 303 British 150 gr InterLock® SP | 150 gr | 2685 fps (818 m/s) | SP | 0.361 |
| Kynoch Kynoch .303 British 174gr FMJ | 174 gr | 2440 fps (744 m/s) | FMJ | 0.378 |
| Kynoch Kynoch .303 British 174gr SP | 174 gr | 2440 fps (744 m/s) | SP | 0.378 |
| PPU PPU .303 British 174gr FMJ | 174 gr | 2460 fps (750 m/s) | FMJ | 0.378 |
| PPU PPU .303 British 174gr SP | 174 gr | 2460 fps (750 m/s) | SP | 0.378 |
| S&B S&B 150.0gr SP SB303B | 150 gr | 2939 fps (896 m/s) | SP | 0.222 |
| S&B S&B 180.0gr FMJ SB303A | 181 gr | 2909 fps (887 m/s) | FMJ | 0.266 |
| S&B S&B 180.0gr SP SB303C | 181 gr | 2940 fps (896 m/s) | SP | 0.266 |
| Winchester Winchester 303 British 180gr Power-Point Power-Point | 180 gr | 2460 fps (750 m/s) | SP | 0.369 |
11 loads available in .303 British.