The 204 Ruger was introduced by Ruger and Hornady in 2004 to create an ultra high speed
.20 caliber varmint and target cartridge.
Basically the 204 Ruger is a .222 Remington Magnum necked down from .223" to .204" and
with a 32 V-max bullet that is a Screamer at 4225 Feet per Second, which may be the fastest
cartridge commercially produced today.
|Picture to the left, showing
3 cartridges for size comparison:
Left: .222 Remington Magnum
Middle: .204 Ruger
Right: .223 Remington or 5.56 NATO