NONE i guess you could use them in a Hammerli 850 but the hammer spring would need to be upgraded to a 1250 Dominator i would think they made the rifle with this great idea that was not so great, the rifle is fine the Nitrogen isn't
None that I’m aware of. If I owned that gun I would 110% buy the refillable air cylinders that are made by a couple manufacturers. Pay for itself quick.