My wife's first deer rifle was a Winchester Model 70 in 243. It was never very accurate same as your Model 7 about 3-4MOA. Found a take off barrel in 308 and had the gunsmith put it on. It did not line up with the stamping's, he said for another $75 he would fix that. Told him not to bother. It's a truck/loaner rifle now. It is MOA with loads it likes. The replacement for the wife's deer rifle was/is a Remington Model 7 in 7mm-08. It is accurate, but was picky with ammo. I would get a take off barrel and take your chances. 7mm=08 is not likely to be shot out. You don't really get a guaranty on a new custom barrel as far as accuracy either, unless they install the barrel and tune the action. Rather than custom barrel route you could buy a Model 7 in 7mm-08 cheaper.