I have a model 11 Hog Hunter in .308. I am thinking of buying an aftermarket 6.5 CM pre-fit barrel. I assume I'll need a barrel vise and a set of go, no-go gauges. How do I remove the smooth barrel but that came factory on my savage? I plan to replace it with a new grooved barrel nut but I'm unsure how to get the old barrel off. Any help would be appreciated, also some recommendations on pre-fit barrel sources if you have experience. Thanks in advance.