Ok so i often go on Jelly King missions to farm with my Divine Avenger, i've noticed that the projectiles from the charge attack pierce(fly through) all monsters....but the mini-jellys... are you kidding me.
The projectiles simply explode on contact with those things, no matter how close.

Another thing, the projectiles explode whenever im backed up against something, obstacle wall etc, dat the projectile can't fly through. When they do, no damage cept for the initial swing.
So the projectiles are so big they reach behind me? I know dis helps with getting more hits on the mobs but.....

Summary on DA charge attack projectiles:
1. They can't pierce mini-jellies
2. The projectiles reach behind me, and can thus do nothing when im backed up against something