90 jlks in a 223 smoke.... of course I am limited by my choice of competition, to a standard 223 in 20 inch tubes....
But don't ever sneeze at a mid 500 bc bullet driven close to 2800 fps...
Of course pushed much faster as a bunch of folks have done in 22/6mms... they are hell at 1000 on the target range too.
Of course 6mms are better, but then we could say the same for 7mms.....