Re: .338 vs .50 BMG
It really depends on what you are trying to do.
A fifty is real fun to shoot but carries a stigma with it resultant of ignorance. Many ranges are not .50 friendly (communist pieces of crap)!
The big fifty is a LOT of fun to shoot! There is not much of a comparison to that! It will attract a lot of people on the range. I like to let people shoot my fifty so that they can learn about it and see how much fun they are to shoot.
The fifty has a wide variety of military type ammunition available, ball, AP, API, spotter tracer (cool stuff), tracer. Outside of the military stuff you start getting a bit more limited however there are still choices such as AMAX and some others.
The set up for reloading on the fifty is more expensive. I'm looking at getting my setup together when I return from Iraq (the Iraq saving plan) dependent on my other projects, .300WM build, 74 Bronco rebuild, Italy trip, couple more lenses for my Nikon D700, another motorcycle, a suppressor and either a M1A or a DPMS or a bolt .308 which is all dependent on mama!
The fifty is an easy rifle to shoot at 1K. I did the 1000 yard qualifier at Tac Pro with the only problem of the scope having to be locktite'd together and the rings to makeit happen with the key lesson of don't buy cheap rings and a cheap scope! This was of course prior to putting on an improved muzzle break design for the fifty.
The .338 Lapua would be a nice rifle to have! But once again it is dependent on what you want to do?
I do not have a .338 but I would like to own so so outside of what I have heard I really can't give you any advice on this rifle.
Good luck and either way I don't think that you will go wrong!
If youdo get into the fifty then check out Biggerhammer and the Fifty Caliber Shooters Association.
Very Respectfully,
Stefan