.177 cal Round nose & pointed 4 pellet types 400ct 100 JSB Match Diabolo Exact, 4.52mm head, 8.4 grains 100 JSB Match Diabolo Exact Heavy, 4.52mm head, 10.3 grains 100 JSB Match Diabolo Exact RS, 4.52mm head, 7.3 grains 100 JSB Match Diabolo Straton, 4.50mm head, 8.3 grains JSB Match Diabolo pellets have a reputation of being uniform in size and weight, which is why they have a reputation for superior accuracy in air rifles and air pistols. This combo tin is a good way to test great pellets to find the right ones for your air guns.