I was told that a 338 lapua is inherently accurate because it shares alot of the size characteristics with a 6PPC (the most accurate round in the world). Is there any validity to this? I think he meant the shorter fatter case and the size of the bullet to the case. I was also told that a ultra mag is a waste of powder over a win mag because it is a long skinny case and a overall bad design! What do you guys think???