heavyBullet said:
I have hunted deer with both 308 and 270, both shoot nice and flat and very accurate at long distances. Both easiely take out deer, though with moose, I'd lean more toward the 308. I could be wrong but I think you can only get up to 150g with the 270 and with the 308 you can get 180g. I also believe that with the 308 the choice of Mfg and types of bullets are like a 30-06, almost endless, more than you would find for the 270. In either case both calibers are a great choice from what I have experienced.
Just my 2 cents.....
Cheers!
I have not shot moose with a 270, or in 150 grain for that matter. However, My father has shot at least 15 moose with a BLR model 81' (browning lever action) in .308.
He uses 150 gr bullets in the 308 for moose hunting. They do the job. I have personally witnessed it. Like anything else, it comes down to proper shot placement. A 180 grain bullet will do the job as well.
I would think that the .270 is capable of putting down moose with a 150gr bullet.
Evster,
A .308 is basically a smaller cartridge (in terms of length) than the 30-06. The 30-06 uses more powder and the 308 uses less. If you are choosing between these two (308 and 30-06) ask yourself if you want a short action or a long action. The difference is minimal.
If you dont mind looking around for ammo, or need a great excuse to get into reloading

grab a 7mm-08

.
It will do everything a 308,30-06, and 270 will with a minimum amount of recoil. I own a savage 30-06 and since I bought the 7mm-08, the savage 06 is pretty much a wall hanger. (My first deer/meat gun)
I wouldn't shy away from shooting a moose/elk with my 7mm-08. It has a max rating of 175gr bullet, but if you cant drop a moose/elk with 175gr, I wouldnt blame the bullet weight or the rifle.
Im sure we have given you many scenerios, now its time to make the choice. Best of luck to ya!