Like others have said, changing barrels is pretty easy. I actually have a video of how to do it posted on Youtube.
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There are excellent instructions on changing the bolt head here. The whole process actually takes longer to explain than to actually do.
http://www.switchbarrel.com/BOLTHEAD.htmUnless you want to do a lot of barrel swapping, it may not be worth it to buy the tools. Here's a breakdown of what it might cost to do the conversion:
Barrel= $50-$350 depending on used ($50) or high end new ($350)
Bolt head= $20 if you just change over the extractor and ejector from your current bolt, if not add $20 for the ejector, extractor and all necessary springs and such.
Barrel nut wrench= $35-$40
Action wrench= $55 (this is optional, but works a lot better than the oak blocks for removing factory barrels)
Barrel vise= $65 for a Wheeler complete barrel vise, or just $20 for a set of oak blocks which can be used in a good bench vise
Headspace go-gauge= $20 (you don't
need this, but it's more reliable than a piece of brass)
Magazine= If it's an older staggered feed mag, $45. If it's a new centerfeed mag, you'll need to call Savage to get a price since I can't find them listed anywhre else.
Honestly, you could probably pick up 30-06 for under $300 and that might be easier. But if you really want to get into barrel swaping, just buy the tools. If you get really into it you can get a port entry action wrench so that you can change barrels on the range. That's always fun to do. If you happen to live in WA, let me know and we can get together and I can help you out.
Andrew