I think of moose as big game so I would use a 375 or a 416 to dispach
one of these beast.
They can be dangerous if wonded, So if your going to use a 308 win
I would recomend the largest bullet your rifle will shoot .
The accubond or the partition would be my choice .
As to accuracy,Heavy bullets can be very accurate and 1/2 moa groups
are very possible with good hunting bullets.
A 308 will kill anything but I would not recomend it for large/dangerous
Hopefully some of the others that have killed Moose will chime in and share
thier experiences with the caliber that they used.
J E CUSTOM