Sierra Varminter Bullets 25 Caliber (257 Diameter) 87 Grain Spitzer (100pk)Sierra Varminter Bullets deliver the performance and consistency needed in the demanding sport of varmint hunting. The 25 Caliber 87 Grain Varminter started out as another varmint bullet option for rifles of this caliber. It then proved to be accurate at any velocity and thus began seeing more use in all 25 Caliber cartridges. Although it is primarily designed for use on varmints, this bullet may be used on medium sized game from smaller capacity