My 5.5" Mdl. 97 will easily run a 250 XTP at 1200 fps with 2400. You can, in fact,approach 1300. It won't be as comfortable as your Ruger Hunter, because of the weight difference. In my 7.5" Mdl. 83 in .454 brass, I run a FA 260 gr. up to 1725 fps, and a 300 Sierra or XTP @ 1550 fps, with 296.