The.22-250 cartridge is a small but powerful high-velocity cartridge that is ideal for varmint hunting or plinking. Sellier & Bellot has upgraded their.22-250 with 55gr projectiles. This bullet style provides deep penetration and moderate expansion, making it an excellent choice for hunters seeking high performance. These.22-250 cartridges have optimal loads of clean-burning powders, Boxer-primers, and new brass casings. The casings are reloadable and non-corrosive.