I would stick with the 7-08 as is...and I wouldn't cut the barrel, all that will do is reduce velocity and accuracy...it really produces no measurable benefits. Like RR...I would also consider the 140 Nosler AccuBond or the 154 Interlock...both great bullets and will preform very well on both hogs and white tails at any range. If you want a 284...then buy a 284...or better yet, as RR points out go 280 and AI it (which will probably be cheaper than the work on the Ruger to convert to a 284.)