Briman and drift,
Why snipers sometimes choose semiauto sniper rifles: #1, they have free access to some of the best, and most expensive semiautos in the world, which will of course be of better quality and decent accuracy, and #2, they' re still soldiers. If you were going to take a rifle to be a military sniper, and had to defend yourself, as well as take the standard sniper shots, you' d pick a semiauto for it' s more rapid-fire ability.
If you watch the sniper competition that' s held at Ft. Benning every year, though, you' ll see something very interesting: when it' s time to simply hit targets,
every last sniper carries a bolt-action rifle.
I will agree that a $5000 semiauto will outshoot a good bolt action. That' s not convincing me to get a semiauto, though.