I have one... 30-338 lapua AI.
I use it for hunting only... I shoot the 240smk with a stiff load of H50bmg. around 3050/3100fps. Brass is great.. no doubt.. recoil is nothing with a good brake. With all that in mind. I would not build another. It is not a very efficient case... With the available High BC projo's in 308 now... IMO you are better severed with something that is inherently more accurate and burns less powder and does the exact same thing. As stated above with Broz 300 win mag... why? because it does the job...
So, if you want a 30-338 lapua that has great brass and WILL kill most anything you shoot at and want the "wildcat cool factor" or just like tinkering with stuff (i do) by all means.. do the lapua.. I did... it will serve just fine as a pure hunting rifle... BUT
If you want something that will be cheaper to run. more than likely more accurate and more efficient...can be built lighter and at the end of the day accomplish the same thing... get a 300 win,308 baer, 300 norma.