believe that the palma guys that shoot 1000y w/ .308s use 30" barrels or longer
my Remington 700P is a 26" barrel, thats a good length for tactical rifles... 24-26" is a good length any longer just gets in the way too much for a sniper
for urban sniper rifles Savage and Remington have 20" barrels on thier .308s definitely fine out to say 600y and definitely better for any tight spaces where you dont want to have a HUGE rifle
my Remington 700P is a 26" barrel, thats a good length for tactical rifles... 24-26" is a good length any longer just gets in the way too much for a sniper
for urban sniper rifles Savage and Remington have 20" barrels on thier .308s definitely fine out to say 600y and definitely better for any tight spaces where you dont want to have a HUGE rifle