500Nitro,
My dad brought his 338 with him when he came up earlier this year and I was not terribly impressed. He was using Barnes X bullets which were great but the round was not totally convincing. Shoulder shots were great IF they broke the shoulder otherwise it was definately a case of a follow up.

I use my 404 as it is light, hits hard and its the first big bore I bought so I have a great love of the cartridge!!!