Rebore will work fine, but with the P14 bolt face, you're looking at something like the 358 Norma Mag. The 35 Whelen and 358 Win cases are too small for a stock P14 bolt face. 358 Norma is one hell of a cartridge though, good for anything that walks in NA. - dan
Ron Smith in Alberta does it. I haven't had one done for quite a few years now, so I would phone hm and ask. He does top notch reboring and makes great barrels. I don't have his phone number handy (I'm traveling for work again), but a search here should find it. - dan
Another cool wildcat that would work well in that action would the 350 G&H, which is simply a 375H&H case necked down to 35cal.Rebore will work fine, but with the P14 bolt face, you're looking at something like the 358 Norma Mag. The 35 Whelen and 358 Win cases are too small for a stock P14 bolt face. 358 Norma is one hell of a cartridge though, good for anything that walks in NA. - dan