I am a long time user of the 338Fed. I geek out on 338 diameter bullets. It is why the 338WM was the first magnum rifle I ever bought. The 338 Fed works great but in reality plenty of other cartridges work too. If you want a SA 338, consider one where brass is easily available and or easily formed. Like MD wrote, 308 is readily available. I have no idea about WSM brass.
