I like Hornady ELD-M. I have shot them in my 300 win mag and brewed up a load for my friend in his 300 WSM. Berger are the ones I depend on for hunting long range in my 270 WSM & Win, 300 Win Mag, and my 338 Win Mag. Elk, Deer, Bear, have no problem expiring quickly with Berger and Nosler bullets. I never got any moose tags so have not tried them on moose. Honestly I have been hearing good things about the ELD-X slugs. I have not personally used them. I like Nosler as well. I would try and see what your rifle likes. My rifles seem to like Berger, H-4831SSC, IMR 4350, Magnum Winchester Primers and well prepped brass.
Later Suckers, this gunsmith needs to get back to work.