....No need to reinvent the wheel.....
Yes there certainly is...........it's............$$$$$$$
....No need to reinvent the wheel.....
When shooting, the .300 BLK seems to have more "punch" than the .223/5.56 but looking up some ballistics, the .223 bests the .300 by about 100 ft./lb. for muzzle energy, so yeah.. it seems like that could very well be true.
We now have .224 in small-case AR platform mix...