I am looking for a 7mm STW rifle. They are not easy to find unless you want a $2000.00 (and up) custom rifle. I have seen a few in Savage rifles which i guess were made by savage for a couple of years. My question is this: How hard would it be to make one out of say...a 7mm rem. mag? or would another cartridge be a better starting point? (7mm WBY, 300 mag, 375 ?) It would seem to me that I would'nt have to re-barrel the gun if I started with a 7mm mag..but admittedly I am a newby at this. Has anyone built one before? Realisticly, what would it cost me beyond the price of the rifle? Any help I could get on this subject would be great.