this are no cast bullet but lead so thinking it fits best here. I see this on the website of an airgun dealer don't knowing what it is. Don't have the airguns and don't want to buy them but allways be interestet what else you can do with such stuff.

4,5 mm, 5,5mm, 6,35, .30 or 7,62mm and 9 mm - 7,65Browning and 9 mm Parabellum bullet for comparison

the .30 caliber Diabolo measure .299 front and .3095 back 2,9 gramm or 44,6 grains

the 9 mm/.35 measure .355 front and .359 back 5,2 gramm or 80,2 grains

they are made by a smaller firm , JSB, in the czech republic and production never meets demand. whenever dealer get them they are sold out very quickly.

they fit any 7,62/308 barrel and 9 mm/.357 barrel so I am sure to find some usage the maker did not think about before.

the can looks impressive alone

second are special slugs for 6,35/.25 caliber high power airguns. you got them in different weights form 28 grains to 46 grains. .251 diameter it s a perfect fit for reloading the 6,35 Browning/.25 ACP. this little cartridge together with the mouse gun is used by some hunter here to shot game in the trap because its small and light and enough also for fox and badger at close range.