(copied from Sniper's Hide Forum)
for sale on AR15.COM
from
www.eaglefirearms.net
Remington 700 5R SS .308 $829
NIB with 24" SS Milspec 5R barrel, SS action, synthetic stock. Very limited production & hard to find. These are basically a Remington 700 Sendero Stainless with the addition of a milspec US Army M24 sniper rifle heavy barrel. Remington had about 300 extra M24 barrels from a military production run & they installed these barrels on these limited edition rifles. This is the only way to get a factory 5R rifle unless you want to pay $3K + for a factory M24.
I just did an internet search on the M24 & found the following info on the 5R rifle barrel: "The barrel of the M24 is unique. Remington hammerforges the barrel with 416R stainless steel, the bull barrel is 24" long, and its width tapers down from 1.2" at the breech to approximately .9". The 5-R rifling was designed by Boots Overmeyer, is angled at 110 degrees, has 5 grooves, and a right hand twist of 1" in 11.2". There are a number of advantages for the military marksman with this barrel. The angled rifling leads to less bullet deformation as the rifling swages it. Some believe that this results in a more even pressure curve as the bullet accelerates through the barrel. As well, once the barrel is broken in, the rifling lends itself to reduced metallic fouling; a longer, more accurate lifespan because of reduced wear effect on rifling cross-section, and higher bullet velocities. The downsides to 5-R rifling are the greater than normal metallic fouling of the bore during the break-in period, and greater difficulty in barrel production, resulting in a more expensive barrel.
After final shoot-off between Steyr SSG rifle and Remington model 700BDL, the latest was standartized in 1987 as a US Army's Model 24 sniper rifle. The M24 has a 24" (609mm) stainless-steel barrel, with a bore specially cut for the M118 7.62mm NATO Match Grade ammunition. The barrel was rifled with a special Remington- developed rifling, called 5R. It had five lands and grooves that make one turn in 11 1/4" (286mm), and the edges of the lands were sligthly rounded to reduce friction.
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