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Greetings Jhon,
Your chrono coukd be right if your friends ammo is the Superformance type which claims 3,000 fps in a 24 inch barrel. Otherwise bright sunlight can cause reading errors, often high....

Just checked and the Light Magnum ammo has gone, replaced with the Superformance stuff. Unfortunately (or perhaps fortunately) the Superformance powder used in the .308 is not available to the...

Greetings Jhon,
2,860 fps for 150 grain in a .308 with an 18 inch barrel? Sounds very high to me unless it is some of the Hornady Light Magnum in which case you won't be able to match it with...

Greetings Jhon,
Most 22 inch barrels will give around 2,750 fps with factory loads and 80 fps less (20 fps per inch lost) or 2,670 fps from 18 inch. Check this by chronographing your mates factory...