From left to right: .223 Rem, 6.8 SPC, .308 Win

More specifically:

• On the left is a .223 Remington caliber rifle round. It’s a Federal P223S, which is using a 55 grain Barnes TSX bullet (.224″ diameter). Published factory data has a muzzle velocity of 3200 fps, muzzle energy of 1250 ft-lbs.
• In the center is a 6.8 Remington SPC caliber rifle round. It’s from Silver State Armory using a 85 grain Barnes TSX bullet (.277″ diameter). Published factory data lists a muzzle velocity of 3030 fps (not sure if that’s for the commercial or tactical load, but the above is a tactical load), and that calculates out to a muzzle energy of 1733 ft-lbs.
• On the right is a .308 Winchester caliber rifle round. It’s a Federal P308H, which uses a 165 grain Barnes TSX bullet (.308″ diameter). Published factory data lists a muzzle velocity of 2650 fps and a muzzle energy of 2573 ft-lbs.

Yes, I like Barnes bullets. 🙂

I wouldn’t say any one of these is necessarily better than the other. I would say that each has a place and role.