Aren't the Axis arrows a smaller diameter? That would let it penetrate further into the block, yet there is still friction when you pull it out. If you pull it straight back it shouldn't be too bad. It also will get easier with use.

Just a note, if you are shooting with the thing on the ground or from a tree stand so that you are shooting down at it, make sure the foam layers are vertical and shoot from directly in front of it.