.243 Winchester Super Short Magnum

.243 Winchester Super Short Magnum

Description

The 243 Winchester Super Short Magnum or 243 WSSM is a rifle cartridge introduced in 2003. It uses a .300 WSM case shortened and necked down to accept a .243in/6mm diameter bullet, and is a high velocity round based on ballistics design philosophies that are intended to produce a high level of efficiency. Wikipedia
 
Case length1.670 in (42.4 mm)
Bullet diameter.243 in (6.2 mm)
Overall length2.36 in (60 mm)
Base diameter.555 in (14.1 mm)
Neck diameter.291 in (7.4 mm)