Introducing Varmint Blue by HSM. If you are looking for an exciting time in the field add Varmint Blue to your arsenal. Loaded with the Sierra Blitzking Blue Thrill bullet it is sure to cure any projectile dysfunction you may have. Loaded in the .223 Remington cartridge and using temperature stable powders HSM is able to thrust the 55 grain bullet at 3120 FPS. HSM guarantees that the Varmint Blue ammunition will always be ready when the moment is right.