i had a rifle built in 6.5 wsm a few years ago, had it re barreled to 300 wsm. i dont have the rifle anymore but i overall wasnt impressed by it. in a long range rifle, heavy bullets are almost a must. that is something a 300 wsm doesnt do well. go for the .300 win mag if thats the class bullet you are going for. also, dont buy into this hype that short mags get the job done in a short barrel. if you try that all you get is alot of muzzleblast and alot of noise. when chambered in a long tube imo they just seem to have a certain refinement to the overall shot sequence.if you do want to get a shorty go for a 6.5 wsm. it can handle the heaviest bullets availible without the need for greatly reduced loads.