Re: A Bolt for long range?
Any shouldered barrel (basically anything but a Savage) will need installing by a gunsmith. It will either be chambered long, so that to fit it requires removing material at the breach and shoulder, or it will be chambered short and then the chamber will need to be reamed to the final depth by the gunsmith.
This is not typically something you would be doing at home since most of us don't have a suitable lathe, nor the $100 reamer nor the skill to do this job 100% without screwing up and having a $600 paperweight. That is the big advantage of the Savage system, they basically eliminated the precision fitting by using the nut. Shilens website will tell you that the barrels need to be fitted by gunsmiths.