| 5 mm/35 SMc | ||
|---|---|---|
5 mm/35 SMc cartridges |
||
| Type | Rifle | |
| Place of origin | USA | |
| Production history | ||
| Designer | Michael "Mic" McPherson and Byrom Smalley | |
| Designed | 2004 | |
| Specifications | ||
| Parent case | 6 mm BR | |
| Bullet diameter | .204 in (5.2 mm) | |
| Shoulder diameter | .4598 in (11.68 mm) | |
| Base diameter | .4709 in (11.96 mm) | |
| Rim diameter | .4728 in (12.01 mm) | |
| Rim thickness | .0157 in (0.40 mm) | |
| Case length | 1.556 in (39.5 mm) | |
| Overall length | 2.03 in (52 mm) | |
| Rifling twist | 1-12 | |
| Primer type | small rifle | |
| Ballistic performance | ||
| Bullet weight/type | Velocity | Energy |
| 32 gr (2.1 g) BT | 4,650 ft/s (1,420 m/s) | 1,535 ft·lbf (2,081 J) |
| 39 gr (2.5 g) BT | 4,250 ft/s (1,300 m/s) | 1,564 ft·lbf (2,120 J) |
| Source(s): Superior Ballistics | ||
5 mm/35 SMc is a high performance 5 mm (.20 caliber) cartridge. Designed by Michael "Mic" McPherson and Byrom Smalley[1] and like all of their other designs carries the "SMc" moniker as well as being patented and having a copyright.[2]
SMc cartridges were developed in an attempt to produce an efficient cartridge combining low recoil, low heat, and high velocity[3]. The 5 mm/35 SMc has produced velocities in excess of 4,800 ft/s (1,500 m/s) shooting a 30-grain (1.9 g) molybdenum disulfide-plated Berger bullet from a 28 inches (71 cm) Pac-Nor barrel, far higher than its commercial counterpart the .204 Ruger.
Although it is a wildcat, rifles chambered for 5mm/35 are available from the custom shop at Savage Arms.[4]
The patents for the cartridge are US 7210260, US 7086336 and US 2003079639.