Re: Buy a Sako TRG 338 or Build a Rem 700 308?
I have nowhere near the amount of experience as most of the Hide members that post here. That being said, I have both of the rifles you are questioning. They are both fabulous. I definitely had to work on the Remy to make the most of it. Rail mount, stock, trigger, etc. The TRG, was, add optics, and spend an additional $455 on the TRG bipod (it IS a remarkable bipod).
If, as you say in your post, you are mainly wanting to shoot to 1000, I would go with the TRG .338. That bullet just reaches out there more easily. I am a novice shooter, and I don't have the wind reading skills of more experienced shooters. That is just not as much of an issue with the LM.
Some of the other responders have mentioned, there is the cost of ammunition. If you are not reloading, buying match ammo is not a cheap proposition. Match .308 is roughly $1 a round more or less. Match .338 LM is $5. Something to consider. This place; http://www.tacticalammunition.com/
has pretty good deals on Match ammo, so you can bring some of those costs down. Also other sites like Palmetto, and South West, have good match ammo at reduced prices.
Lastly, recoil. If you have shot the .338 LM, we can stop here. If you haven't, you definitely should before you make that kind of commitment. The TRG is a heavy piece, but there is still some kick. I think you shall have fun with whatever you decide. Best of luck.