[marktwain]

Energy on the 5.56 and .300 blk rounds are virtually equal.

.300 blackout is much more energetic than the .30 carbine.

With a 110 grain bullet, velocity on the .30 carbine is 1950 fps. With the .300 blackout, the velocity is 2350 fps.

That means the energy level of the .300 blackout is 45% greater than the energy of the carbine.

The .300 blk approaches .30-30 levels.

[Man from Oz]

The true essence of the 300 BLK becomes apparent when one attaches a can and shoots subsonic.....

[Garth Tater]

"With a 110 grain bullet, velocity on the .30 carbine is 1950 fps. With the .300 blackout, the velocity is 2350 fps."

"That means the energy level of the .300 blackout is 45% greater than the energy of the carbine."

True, but the little M1 Carbine is a lot lighter and with a folding stock it's just the right size for riding around behind your seat. You can't get an AR to fold up like that.

The M1 has another benefit as a go-to-war machine that were not allowed to talk about here but with about 5 minutes on your bench the M1 Carbine moves into a category all its own.