This was on there and is good info if it is accurate.
Look at it this way.
A .308 winchester 110gr Hornady TAP leaves a 24 inch barrel at 3165fps and by 250 yards ts at about 2370fps and at 825 yards is running around 300ft lbs of energy and 1109 fps
a 300 AAC Blackout 110gr Barnes Vortx leaves a 16 inch barrel at 2350 fps at about 575 yards is 300ft lbs of energy and 1111 fps
It doesn't have the range of a .308 but it still packs a lot of power into a smaller lighter package that is compatible with every part of the AR15 platform Minus the barrel.
That is the info I remembered but I couldn't find. I've been saying for a while, Anything you can shoot with a .308, you can shoot with a 300BLK, just not from as far away! Now we know how much . 250 Yards And that is with a barrel 8"s longer.
those figures are cherry picked start comparing numbers with something like a 168 grain boat tail hollow point and it wont even be close . I own a rock river 20 inch 308 and would not get rid of it for anything . yes its heavy , thats why they make slings it is also heavy duty when it comes time to lay down some lead and make cover into concealment , but it wont cycle sub-sonic ammo so that is how and why I come to own a 300 black out. for me they are both different tools that excel at there job .