Quick view Hornady Hornady Superformance Varmint, Horn*8343 243 Win 58 Vmax Spf $51.95 $36.16 Speed kills.Varmint hunters can now reap the benefits of hornady superformance propellant technology in their favorite varmint cartridges.Superformance varmint ammunition delivers muzzle velocity increases of 100 to 200 feet per second, accuracy,... Compare Add to Cart