Re: How to Change a Barrel?
for a rebarrel, it will depend on what barrel you have. If you have a blank, it will likely take a gunsmith and a lathe to rebarrel. If you have a take-off barrel from another Tikka, then you might be able to just take off your barrel and install the other and get lucky on the headspace. This would require a barrel vise, action wrench, and go and no-go gauges to complete, assuming that both calibers use the same bolt-face. There are books and videos out there explaining the steps to rebarrel a rifle, but as they explain part of the gunsmithing trade, they generally cost a little bit of money.
What exactly are you trying to do? What barrel do you have. The more information you give the more we can help.
Dave