Right, you probably wont be shooting long distances, but that isnt the point. The point is that with a $1.25 foster slug you can reach out to 100, and with this $30 gimmick, you can't. You are paying more and sacrificing the ability to shoot at extended ranges to gain what? Additional recoil? Less penetration (if it works as claimed)?
On a side note, my opinion is that anything powerful enough to consistently penetrate human bone and tissue far enough to damage vital organs from any angle is going to rip through several layers of drywall and will probably pass through a human torso if no bone is contacted. "Over-penetration" is a fear created by ammunition manufacturers allowing them to sell crappy projectiles at high prices. Hornady TAP is an example of this, that stuff is balliatic garbage.