I have an old Remington 25.06 thats been sitting in the safe for quite sometime thats not seeing any use and since i have another one i'm considering having the old one rechambered to either a 25.06 AI or a 257 Weatherby Mag just to have another toy to play with in a different caliber. I'm thinking more of going to the 257 since i have another 25.06 and the AI wouldn't really be a big difference to me. My question is this, if i rechamber to the 257 will the barrel have to be set back and would the bolt face and extractor have to be changed or modified for the magnum diameter? Also does anyone have a 257 Weatherby mag and if so what do you think of it? Thanks!