Hell that flyer could have been a reloading issue too. Are you using a vld seating stem with those bullets? In my 280 shooting the 175gr eldx I need to, otherwise I'm not making even contact around the bullet and I get concentricity issues, as well as a ring around the bullet b/t the ogive and the tip.
Could have been anything that isn't consistent... odd piece of brass/inconsistent neck tension on that load, maybe the primer had an issue, maybe you misweighed the charge, maybe it was seated to a slightly diff. depth... who knows.
Could have been anything that isn't consistent... odd piece of brass/inconsistent neck tension on that load, maybe the primer had an issue, maybe you misweighed the charge, maybe it was seated to a slightly diff. depth... who knows.