they are not worth buying . they shoot ok but realy don't do much more then a pellet . i have 2 full boxes of them . about 200 i think . and i never use them . got them just 'cause they were cheap.
i wouldn't use them in your best rifled barrel either ,could scuff it up .
i would love to get some 22 cal darts...i put up a thead a fee weeks ago about it and did not get 1 responce....22 darts use to be around the same as 177 but now only 177 darts are made that i can find....i would buy 22 if i could get them,use to come in bags of 12.
Just a friendly FYI - don't use darts in a magnum class springer - even if it's a beater, and you don't care about damaging the rifling. The darts are almost as bad for the gun as dry firing it, and will batter it into oblivion in fairly short order.
The darts were generally used in the pubs, shooting at 3 to 6 yards, and generally from air pistols, equipped with smoothbore barrels. If you had in mind using them for hunting, or long range shooting, you will be disappointed - they just don't work that great.