I prefer 4x on the bottom end, there's a lot of brushy thick areas here and sometimes it's difficult to keep track of a squirrel as it moves around with more magnification than that. Just personal preference, it's hard to make an all around declaration of what's best as terrain, guns and every person is a bit different and what one likes another won't. Some situations a bottom end of 6x will be fine, others you might be wishing for a 2x.