"stay good" I presume you mean stay supersonic - for the 700P (assuming the 26" barrel, not the 20" LTR) the 175s Federal Gold Medal Match can go at least to 1,000 yards. Some say teh maximum effective range of the .308 is 800 yards - others say 1,000 yards. I've shot it out past 1,000 yards, and could hit what I aimed at. I suspect Mel awnd some of the other members here have taken it out past 1,100 yards - but I'll let themspeak on this for themselves.
The 300 WM shoots the same size bullets (30 caliber) as the .308, it just does so MUCH faster, whcih allows you - the shooter - to stretch the maximum effective range to at least 1,200 yards.
.308 is solid out to 800 yards... you can with the proper ammo and proper rifle streach the .308 to 1,000 yards and a little further. Considering the USMC has multiple confirmed kills further than 1,000 yards with the .308... i would say its definitly capable of 1,000 + yard shots consitantly.
800 is a safe bet. Beyond that depending on barrel twist, length, bullet weight, etc. it will start to go subsonic and drop off the charts quick. That being said I've hit 1300 with an 18" barrel. They may have hit backwords or sideways but they did hit.
A lethal shot with the 308 really shouldn't be attempted beyond 800 unless there are circumstances that would safely allow it.
The US Army lists the maximum effective range of the M24 as 800 meters (About 880 yards). The USMC says 1000 yards for their M40 series. I've not shot at 1300 yards like patriot, but I have shot at, and hit 1050 meters (1150+ yards) with the M24/308. I, like others, regard the 800 meter line as being about the max "EFFECTIVE" range.
Well the effective range of the 700P depends entirely what type of twist that barell as well as the caliber boss. A .223 will be roughhly 500 yards MAX effetive range. A .308 Winchester will be about 870 yards plus change Max effective range, although I have heard of hits out past 1000. Once you get into the magnums you are going to really be able to reach out and touch something. the 7mm Rem Mag and 300 Winchester will easily reach 1000 yards. These rounds have their drawbacks though. Depending on how often it is shot as well as how long between shots the barell is allowed to cool, the throats will erode due to the high heat and pressure. On average a 7mm Rem mag is good from 1400-2000 rounds. A 300 is good from about 1000-1600. I have a 700P in a 7mm Rem mag and .308 and with me modifying the triggers, If me and the rifle do our part, they are 1000 yard capable rifles, and the 7mm could reach out to 1400.
ya.... using M118 ammo pushed the M14 DMR out to a little over 1100 yds, but it was using the MK4 scope at 10 plus 3.ish mils high with no wind .... so ya the 308 can do past 1000 yds, but it isn't in the idea of "accurate shots". just my experience.