Longer throat maximizes long sleek bullets. I did what Idaho Tracker did when I ordered my barrel and sent in a dummy round. I believe my coal was 3.6 for the 270 eldx.
Reason I went with 33 nosler was to have proper head stamped brass in a commercial cartridge, if I was lucky enough to travel abroad with the gun.
Also , I've got some great deals on 125 brand new cartridge of 33 nosler for sale in the reloading section.