Wanting a do-it-yourself custom 338 Edge for the non-gunsmith. I've been thinking about starting with a Savage magnum action and dropping in a McGowan 338 barrel prefit replacement. Then adding an aftermarket stock. Has anyone gone this route? Also wondering if there are extended box magazines for the Savage to load the 300 gr. Bergers long and keep it a repeater. Finally, opinions on the best trigger for this build. Thanks in advance.