| rando1000 |
The sniper archtype lists the ability Deadly Range.
Deadly Range (Ex)
At 3rd level, a sniper increases the range at which she can apply her sneak attack damage by 10 feet. This range increases by 10 feet for every 3 levels after 3rd.
I can't seem to find the normal range limit at which sneak attack damage can be applied, simply that "The rogue must be able to see the target well enough to pick out a vital spot and must be able to reach such a spot."