Re: Remington VTR triangle barrel
A moose is a big target, even at 600yds. So, just about any factory barrel will do the deed with decent ammo.
As for precision shooting, I expect that Rem has turned out a few VTR barrels that were pretty good shooters. But, factory barrels across the board are not as good as top shelf aftermarket barrels.
So, I would always lean towards, Kreiger, Bartlein, Broughton, Shilen, etc... over a factory barrel.
For an off the shelf Rem 700 308, I'd probably lean towards one of the 5R options. But, that's just an opinion.