Friction not working


I am making some projectile spawners and I just can’t figure out why they keep sliding.

As you see in the album, they spawn, continue over the hill, and never see a decrease in velocity until they fly off the landscape.

In the projectile blueprint, it’s Projectile Movement Component has friction value of .2 . I have tried changed this to be higher and lower but have had no success.

Any help would be appreciated,