the whole point of going to a 338 is to be a "step up" from the 30 calibers- for some reason , the shooter feels that 220 grains moving at 23-2600 isn't "enough"- hence, the 338 and it's family of bullet weights- remember, the 338 was designed around the 458, and that's really all it is,- a necked down 458 to use lighter bullets- if you get a 338 and then handicap it by using a lesser capacity case and light bullets,( ie under 250 grain) you might as well be using your 06/308/whatever- essentialy, that's what you've got
i've got a 338 win mag in a bar, and when that thing lets go , you KNOW that ain't no '06- in all three areas- noise, recoil, smoke-
not to mention your bullets, while better constructed than the average 30 , also DOUBLE in price-