[WaM14gunner]

6mm Remington

Neck is too short.

 

[WaM14gunner]

That thing is about as long as his middle finger. Looks like a speed-demon .22-250 -a varmint round. It flies at ~ 4000 ft/sec! You guys should try those varmint rounds - lots of fun!

Its actually about as long as his little finger, maybe roughly 2.5" OAL, but we have no idea the size of the guys hands either.

 

[WaM14gunner]

Yep, sure is.

 

[WaM14gunner]

5.6x50 magnum

That does seem like a possibility. I confess I had to go look that one up.

 

[WaM14gunner]

I disagree.

You may, but it seems pretty obvious to me that the OP's round and the 6mm Rem in my hand are not the same at all in the neck and shoulder or OAL for that matter.