Measuring velocity from 69" down to 19" in .308Win.
https://www.youtube.com/watch?v=XCqa2umL8ME
JohnV wrote:Interesting test . I think there is a glitch in their test results around the 25 1/2 inch mark . It's not going to suddenly drop like that and then climb again .
Getting 69 inch barrel out the truck window would be a bit cumbersome but the muzzle blast would be light . Think I will just stick to 22 to 26.5 inch barrels .