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Good read. Thanks!
Barrel harmonics are an issue for reloaders who are trying to make a .25 MOA rifle. For Appleseed purposes, we're really just looking for a rifle that will shoot 4 MOA, so I wouldn't want anyone to stress over making the perfect load for an Appleseed...
It does explain some things, like why my PSL (Romanian Dragunov) groups better with ammo made with pulled M80 Ball bullets than with 168 gr Sierra MatchKings.
Not needed for a 4 MOA rifle, but, as some of you progress, and start reaching out past 400 yards, something to remember.