Re: Shoot all day...
For the money, I'd sooner get a Glock 17 with 33 round magazines, and shoot cheap ammo thru it. Just tonight, I saw the 100 round "white box" at Wallys for $22. The Glock costs more initially, but the difference in ammo costs offsets that as you go along. That way, you have the option for ammo that really is substantial.
There is NO .22 WMR that is loaded for pistol length barrels, so you're getting very dismal performance from ammo that costs as much or more than 9mm.
I suppose that Kel-Tec is counting on the perception that this is a less expensive version of that FN thing that fires 5.56x28mm. The FN ammo is designed to work in that barrel length, but even that is wimpy, compared to 9x19.
Around here, we don't say "Oh shucks", or "oh man". We say Oh BAMA!!