I have an opportunity to purchase a Remington bolt action rifle, I think it is a Model 591. The caliber is 5 MM and it is a rimfire. very nice looking rifle but I understand the 5 MM ammo is no longer available and this gun is really not very valuable. My question is this: can this gun be rechambered, rebarreled, whatever in order to make it an economical shooter? How expensive is it to re-barrel a rifle like this? Thanks for any advice.