For a rifle where weight is not a factor, I think the Lapua is a great round. The only argument I have against the Lapua is the large case head. Stress analysis proves that it needs a larger action than a Rem700, where the bolt nose gets too thin. I have nothing against the larger actions except they weigh more, so for my long range hunting rifle, where weight is a factor, I chose the 338 RUM to keep the weight down.
I also don't think a big 338 is overkill. The high BC bullets drift the least in wind, so I'm more likely to hit where I'm aiming than any other cartridge.
I also don't think a big 338 is overkill. The high BC bullets drift the least in wind, so I'm more likely to hit where I'm aiming than any other cartridge.