I've shot a lot of Lee-Enfield No4 Mk2 rifles and found them to be quite accurate, but also shot a friend's M1 Garand in a special Service Rifle match (200, 300 & 600 yards) and was very impressed at how easy it was to keep hits in the 10 ring. The front sight fell off during the first string at 300 yards and the operating rod fell off during the second string but it was a shooter for sure.
This isn't what you're looking for but my Accuracy International AW (.308 Win), AWM (.300 Win Mag) and AWM (.338 Lapua Mag) were all issued in the first and second Gulf wars to British troops and they are by far the most accurate bolt action rifles I've ever owned. I also have an AI AXMC but don't know if that's been used in any conflicts yet.
This isn't what you're looking for but my Accuracy International AW (.308 Win), AWM (.300 Win Mag) and AWM (.338 Lapua Mag) were all issued in the first and second Gulf wars to British troops and they are by far the most accurate bolt action rifles I've ever owned. I also have an AI AXMC but don't know if that's been used in any conflicts yet.