Wow Fruit, if I had Desirable they might be really, really huge because my Pawnees are mostly around 1.75 " long. Your Pawnees look more like my Peruques. I am quite happy with the Pawnees I got this year. They are larger than the typical bagged pecans in the store, and I don't mean the local Missouri pecans, but the ones shipped in probably from Texas or perhaps somewhere in the south. The kernel is also nice and golden, and to me the taste is superior to most pecans I have had. I don't recall the name of the piston cracker I have, but I modified it by mounting it on a slanted board and adding a longer arm. The Pawnees and Peruques crack out nicely.
Dax, my pecans are indeed smack on with those pics. The Colby do vary significantly in size, and I don't find their flavor to be as good as the Pawnees or Peruques, so of course the Colby is the largest and most productive of my trees so far. I have many wild pecans, and I will say that their flavor can be very good, but they are mostly too small to tempt me to harvest them. I crack a few, but they often do not crack out easily. At least they serve to pollinate my grafted trees, and I do have some named seedlings I got from the Conservation Department that will be coming along, hopefully before I croak. It will be interesting to see if any of those happen to produce decent nuts.