The species gets you into the ballpark of grain-structure and density, but each tree is different and you can have too soft a wood in about any of them. Black Cherry, American Walnut, Ash, Sugar/Hard Maple are what i look at for Southern guns. And am growing more now, as i just sold a few logs.
North side of the hill/mountain trees grow better this far South as they don't suffer as much in drought.
Wonder if any of those underwater recovered logs (of old growth-very high ring count) ever got themselves shaped into gunstocks?