The two 30-338's that I had shot very well. Used them for Elk and long range Deer. Very nearly the same case as the .308 Norma Mag. I used the 180 gr. SBT by Sierra for Deer and the Nos. Part. in 200 gr. for Elk. The cartridge is a great round but there are several versions and all wildcats except the Norma. Hope the info. helps.
With respect to God and your Country, do as you please.