So I’ve been researching turning my Savage 223 into an AI to use mainly for prairie dogs. I’m finding light and fast bullets work best. Like 40gr up to 53gr vmax. I’d like to find a prefit barrel in a 12 twist with zero to minimal freebore. Am I on the right track here? If so, does anybody know where I can find a prefit built this way? I’ve noticed some guys have had to order a custom reamer but would like to avoid that if possible. Thanks for any input.