Owning a 30-378 you probably know that these large cases really shine with heavier bullets. A friend I reload with shoots 200 grain accubonds in his 300 ultras. He loads with Retumbo 96 grains max and RL25 92 grains max. I do not know OAL but he sits them out as far as the magazine allows. Velocities are 3200 from a 26 inch barrel. He is rebarreling a savage with a 28" Shilen and hopes to crack 3300 with it. When you compare the .588 BC for this bullet it will match the trajectory of the 180s with less wind drift and higher KE.