Just a quick addition here; the 11.25 would be the way to go if you're going to run the heavier bullets. The 168s mentioned will work just fine out to around 600 yards, but won't stay supersonic out to 1,000. They run out of gas between 800-900 yards in a 308. The 175s will stay supersonic out that far if they're driven to about 2,640 fps, which is what LC runs the M118LR (which uses this bullet) Match ammo. The 1x12s will handle everything up to and including the 190s, but they're starting to get a bit marginal at that point.
The old style 180 was a great bullet in the M1 and M14, but Sierra discontinued this bullet close to 20 years ago. They replaced it with a short-boat tailed 180 MK that is totally useless, and also won't stay supersonic at 1,000. Ironic, since this was pretty much the only reason for being for that bullet. The AMU continued to buy special runs of those old-style bullets for several years afterwards, until the ARs took the game over and the M14s disappeared altogether.
Lastly, do not EVER run 190s in either the M1 or M14s. You'll damage the gun, even if the loads are perfectly safe and well within pressure limits. The 175s or 180s are the heaviest that these should ever be fed. Otherwise, you'll wind up replacing op rods, which aren't gettin' any cheaper these days. These guns simply aren't designed to use the heavier bullets, and are balanced for bullets in the 150-175 grain range.