Kirby,
Have you tested some of the newer turned monos in your cartridges? Results. Was just looking at older threads back when the 338AM was first on the scene. Some were running 34-36" barrels. Was thinking what using some of the new high BC turned monos would do. Take a Badlands 275 SBD that has a G7 around .451. Looking at reported vel 3500 fps would seem doable. That would make a heck of a 1500 yd combo. 275@2k fps has some authority. Now we seem to have more steady produced high bc choices then back them.