Velocity loss

[Downwindtracker2]

This is interesting but means very little . Last Saturday at the range I brought my chrony along to do some load development. I chronyed a couple of my buddy's Winchester 180gr 30-06 Power Points.one out of my '80 M-700,the other out of his new M-760 carbine.Book 2700f/s,22" barrel 2674f/s,18 1/2" barrel 2534f/s

My buddy now can use 308 ballistic charts.