I looked at this caliber this winter and was considering it for yotes after finding some Winchester ammo on the shelf and was curious. The energy of this round in a small caliber is awesome. Tell us what you think once you shoot it. I decided to stay with with a more practical timeless cartridge but if you like to play with these types of things It looks like it would be fun. I can see prairie dogs being vaporized by this round.
All from Wikipedia below According to Browning, the .223 WSSM offers a 600 ft/s (180 m/s) gain, with a 55 gr (3.6 g) bullet, over the standard .223 Rem. It also offers a 440 ft/s (130 m/s) gain over the 22-250, a popular vermin round. This comes out to a 600 ft·lbf (810 J) gain over a standard .223 Rem, and a 350 ft·lbf (470 J) gain over the 22-250.[9] It is currently the fastest production .22 caliber round in the world with muzzle velocities as high as 4,600 feet per second (1,402 meters per second).[2] [3] [4] [5]