Probably the least expensive way to go would be to buy a used long action rifle with a standard bolt face (and if it has a 7mm barrel, so much the better). If it has the 7mm barrel, spin off the barrel, turn back the shoulder about .004"-.010" or so (there are clearance measurements involved, so don't guess), shorten the shank the same amount, turn the threads back to the new shoulder, ream the chamber, and put the barrel back on. If it doesn't have a 7mm barrel, you'll need to buy one, have it fitted, chambered, tapered, crowned and finished. then reblue the whole rifle. If the new barrel is a different profile then the old one, you'll have to refit the stock's fore end to the new barrel. That will be more expensive. I would expect to pay about $180 or so to rechamber an existing 7mm, the new barrel route will probably add $400-$500 to that (although there are less expensive barrels out there). If you go for a name barrel, it will probably be another $500 on top of that. HTH - Dan