But you will need accuracy to hit "just the right spot", and to get accuracy at long distance, you need a heavier bullet (https://en.m.wikipedia.org/wiki/Sniper_rifle#Maximum_effecti...: "The recent trend in specialized military sniper rifles is towards larger calibers that offer relatively favorable hit probabilities at greater range"), don't you?
True, but "heavier bullet" does not always mean "larger caliber". Also there's no telling at what distance a sniper team would have to be. Maybe they could be inside of 1km?
Also "just the right spot" could be huge on a rocket. The thing is as wide as a barn.
