I have a kind of dumb question so please excuse my stupidity. If I have a Vanguard in .30-06 and would like to either re-chamber/re-bore it to .338-06 or re-barrel it. I see a couple take-offs on GunBroker that are from Ultralights. Could I just screw one of these on without too much extra work/expense or are they not compatible? If so, what does it typically cost for this type of swap? And, if anyone has done this, are there any feed issues? Thanks!