Yes and a 6.5 JDJ is a blown out .225 Win with little else changed. In another forum/website there is a pretty good explanation of why some higher pressure rounds are suitable and some are not. It has to do with head size, shoulder angle and case brass quality. I have researched this a few times as I was wanting to build something on the order of .22 30-30 Imp., .219 DW or .225 Win ....trying to max out a .22 cal out of a Contender. From what I have read it comes down to .226 JDJ or a .222 Rem mag Imp.