It's it's own thing to a large extent. Small port long action (Large target action if you will) I don't really know what other things were changed but apparently it's "accurized" like some of the high end target rifles. I have one and like it (except for it's powder appetite, but what'a ya gonna do?)
This is a pretty good article on it http://www.americanrifleman.org/articles/savage-110-ba/
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