The German made characteristics of RWS Power Ball pellets make this diabolo shaped pellet an excellent choice for hunting small animals like pests and varmints with a 177 caliber break barrel air rifle. Power Ball pellets are also optimum for silhouette shooting where high energy transfer is a must. The combination of the combined steel ball and lead construction of the RWS Power Ball creates a balanced pellet with consistent accuracy and excellent penetration on target. Power Ball pellets are 7.1 mm long. .177 caliber, 0.61 grams, 9.4 grain.