I am shooting them in a savage 338 Lapua with great accuracy. First outing with no wind shot a .277 ctc group at 100 yards and the second time with 8-15mph full value winds shot a .404 ctc group but without the horizontal it would have been about .100 group ctc.
Barnes said to start with 82 or 83 grains of Retumbo for the Lapua.
My load is 84.4 grains of retumbo at 2707 fps.
Defiantly give them a try.