Are these ammo good or recommended for desert eagle chambered in 44 mag ?
Yes, these will be good for a .44 Mag Desert Eagle. Our similar remanufactured ammo has been used by a local range in their rental for a few years now!
There are a wide variety of factors that have an impact on muzzle velocity, as you probably know. At our altitude in Calgary (3500ft) one could expect ~1300FPS from a 6" barrel with this loading.