Mr Friendly, if you want a P17 in 338-06 go for it. Instead of playing around with your rifle, put an ad in the EE, stating what you're looking for. Someone will have one for sale. You can't build that rifle as cheap as what you can buy one for. It is just as expensive to buy a new barrel and have it fitted as to rebore the old one. That's just the beginning. If you're looking for a cheap rifle, you're on the wrong track. If you're looking to make up a unique rifle in milsurp configuration, each to his own. Obviously there is something wrong with the bore or the rifle has already been cut down. Maybe you got it cheap or as a freebie. The 30-06 round that it is chambered for will do just about anything the 338-06 will do, when loaded with 200 grain bullets.
Again, if you're just looking for a 338-06 and you're on a budget, check out the EE, maybe even think about a 35 Whelan, they're kissing cousins.