Is your 308 a baby bullet? Grow up! #gun #boltactionrifle

.30-06 Springfield
.300 Winchester Magnum
.300 Remington Ultra Magnum
.338 Lapua Magnum
.338 Winchester Magnum
.375 H&H Magnum
.416 Rigby.458 Winchester Magnum
.50 BMG (Browning Machine Gun)
Note that there are many other rifle cartridges with larger bullet diameters than the .308 Winchester, but these are some of the most well-known and widely-used cartridges.