I have a Ruger No1 V bull barrel Varment rifle, factory chambered for 7mm Rem Mag. They only made a few of them, so chambered, in the mid 1960s. I also had a No1 light sporter chambered for the 7mmRem Mag as well, and it is even rarer than the No1 V in 7mm mag. However I don't think there will ever be a mod 700, of any discription, that will become a collector piece. like all the push feed rifles made in the USA back in the sixties, and early seventies will simply be used rifles, unless VERY RARE! The Ruger No1s being the exception!

The Ruger No3 chambered for 375 Win, would be easy to chamber to 375 JDJ, now that factory ammo is avaliable for it! They both have a 1-12' twist barrel. It would be a lot better if a No1 stock was installed, however. Just my opinion.