I'll be buying a new press in the near future and the Marksman looks like a good option to me. I can't seem to find the dimension of the opening though. I would like to buy one that will load what I have and what I plan on loading for in the future (338 Edge w/ 300 Bergers). I was wondering if someone that has one would measure to see how long of a cartridge it would take? I would appreciate it. Just curious if I need to keep my eyes set on a Marksman or start looking elsewhere.