I have been building uppers for the AR-15 in the WSSM line. The .243 has been selling quite well to the predator hunters. It's hard to compare aples to aples with hand-loads but I have been getting consistently higher velocities out of my .243 WSSM than I have gotten with my .243 Winchester out of an AR-10. The other "up-side" is that they are about 3 pounds lighter and $400.00 cheaper!

I like the WSSMs, I think they're here to stay.