"At the present time, in both the Western world and within NATO, the 7.62×51mm is currently the primary cartridge of choice for military and police sniper rifles. Worldwide, the trend is similar."
7.62 is close to a .308 (7.82mm) but I'd guess any mil or fed sniper is using the 7.62 as standard issue.
From Wikipedia. so take with a grain of salt:
"At the present time, in both the Western world and within NATO, the 7.62×51mm is currently the primary cartridge of choice for military and police sniper rifles. Worldwide, the trend is similar."
7.62 is close to a .308 (7.82mm) but I'd guess any mil or fed sniper is using the 7.62 as standard issue.
We definitely need to work with the correct round. With the new modern day rounds it is not a given as much as it used to be in old school days.