5 mm/35 SMc

5 mm/35 SMc is a high performance 5 mm (.20 inch) cartridge. Designed by Michael McPherson and Byrom Smalley[1] and like all of their other designs carries the "SMc" designation as well as being patented.[2]

5 mm/35 SMc
5 mm/35 SMc cartridges
TypeRifle
Place of originUSA
Production history
DesignerMichael McPherson and Byrom Smalley
Designed2004
Specifications
Parent case6mm 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 length1.556 in (39.5 mm)
Overall length2.03 in (52 mm)
Rifling twist1-12
Primer typesmall rifle
Ballistic performance
Bullet mass/type Velocity Energy
32 gr (2 g) BT 4,650 ft/s (1,420 m/s) 1,535 ft⋅lbf (2,081 J)
39 gr (3 g) BT 4,250 ft/s (1,300 m/s) 1,564 ft⋅lbf (2,120 J)
Source(s): Superior Ballistics

Description

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-coated 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 cartridge, 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.

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See also

References
  1. Biographies. SBI. Accessed March 3, 2007.
  2. Johnson, Norman E (July 2006). "The 5mm/35 SMc Cartridge in a Custom Savage Model 12". Varmint Hunter. Retrieved 3 October 2010.
  3. Mission Statement at Superior Ballistics Inc.
  4. Madelon, Kimberly. "Varminter in 5/35 SMC". Rifle Shooter. Archived from the original on 16 May 2008. Retrieved 3 October 2010.


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