I have not used 338 edge but have used 338 rum in both. case capacity are very close about 1gr. ADG will be better prep. Bertram will get a few more reloads. ADG pressured sooner about 20 fps. made in USA has to get the edge
I have not used Bertram brass for 338 edge. I have used ADG. It’s very nice brass. I have 7 firings on a 2850 FPS load with 28” barrel and H1000 with 300 grain bergers. I ran it up to 2920 and just started to feel a slight bolt resistence. The consistency across weights, necks, and dimensions is very good.