Hey all.
I have decided to mag feed my Edge and make it a repeater. The company that offers the bottom metal I need offers a set-up to feed up to the big 3.85 COAL's. They have two magazines at that size optimized for the .338LM and the .300MW. I have perused ammoguide to look at the parent case sizes, but not sure which magazine to get for my .338 Edge rounds. Any ideas??

DC