16" in .308 still allows accurate shots past 200m, and the calibre is well suited to shorter barrels, with proportionally less velocity loss than most other calibres. A shorter barrel = less whip / harmonic vibration, and is therefore stiffer than a longer tube, for the same thickness. There is a lot of info about this on the web.
A short, handy rifle with a suppressor is ideal in these situations. NZ has no licence / permit requirement for using suppressors, so that is also a big plus. As said, the average shot distance is way less than 80m in dense north island forest.
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