The .225 Winchester's case is a parent case for some of SSK Industries' popular line of JDJ cartridges designed by J.D. Jones, chosen for its strength and semi-rimmed design which makes it well suited for use in break-open actions.
The Winchester Model 54 is a bolt-action rifle manufactured by the Winchester Repeating Arms Company. The 54 was the first successful production run civilian centerfire bolt action for Winchester. Using a Mauser 98-type action, the 54 was a less-expensive derivation of the limited-production handmade Model 51 "Imperial" of 1919 .