The .375 Viersco Magnum (9.5 x 87.5mm) is a rimless, magnum-length rifle cartridge designed for the hunting of large game and long-range competition shooting. The case is engineered with a wider than typical .532" or .640" magnum base, increasing case volume to improve long-range performance.

.375 Viersco Magnum
TypeRifle
Place of originUnited States
Production history
DesignerViersco, MFG
ManufacturerViersco
Specifications
Parent caseUnique
Case typeRimless, bottleneck
Bullet diameter.375 in. (9.5mm)
Neck diameter.398 in (10.11 mm)
Shoulder diameter.664 in (16.86 mm)
Base diameter.680 in (17.272 mm)
Rim diameter.675 in (17.145 mm)
Rim thickness.065 in (1.7 mm)
Case length3.445 in (87.5 mm)
Overall length4.150 in (105.41 mm)
Case capacity190 gr H2O (12 cm3)
Rifling twist1 in 10 in (254 mm) or 1 in 7 in (180 mm)
Primer typeLarge rifle
Maximum pressure64,800 psi (447 MPa)
Ballistic performance
Bullet mass/type Velocity Energy
300 gr (19 g) SP 2,840 ft/s (870 m/s) 5,374 ft⋅lbf (7,286 J)
350 gr (23 g) DGS 2,660 ft/s (810 m/s) 5,500 ft⋅lbf (7,500 J)
375 gr (24 g) 2,326 ft/s (709 m/s) 4,506 ft⋅lbf (6,109 J)
Test barrel length: 26
Source(s): Viersco Mfg[1]

References

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  1. ^ "Black Diamond Rifles". Viersco Mfg. Retrieved 5 December 2010.