OCW with Retumbo in Lapua brass will be right on, or very close to 89.3 grains. We're getting 2700 fps from two different Savage rifles (26" bbls) with this load... next higher node is above 92 grains Retumbo, and cases show signs of pressure excess...
The 89.3 Retumbo load in Lapua brass is super-accurate... if you have Hornady brass (well, first, my condolences...
)... but the same node will be closer to 92 grains.
Dan