How Short is too short

[yoni]

In 5.56 I think the shorties you can go is the 10.5" barrel and still get good results on meat with the round.

I know some people that have been getting good results with 300Blk down to 8".

So my question is how short can we go with the 6.5?

Seems a lot of guys are doing 12.5", but at that length I would stick with a 14.5" with flash suppressor permanently attached.