Sierra .25 87g SpitzerVarminter. Originally designed as a varmint bullet for smaller capacity 25 caliber cartridges, this 87 grain Spitzer bullet #1610 has taken on an expanded role. It turned out to be extremely accurate at all velocity levels, making it suitable for loading in the entire range of 25 caliber cartridges. This bullet gives outstanding performance as a varmint bullet at high velocities but may also be used as a medium game bullet from smaller capacity