>>7
Sniper perk's something like LK x 10 = crit chance (with 95% being max). With lk 10 I'd always get crits with it, and with the better criticals perk I'd have a 3/10 chance of instantkilling regardless of damage.
Of course even under normal circumstances pre-sniper perk the advantage of LK10 is really awesome anyways. You end up with a shitload of crits. Punches to the head with LK10 are the only way my weak diplomat type with no unarmed skill ends up as reno boxing champ/killing Lo Pan.