Hey RC,
I think this is the first time I have ever seen anything you said that I would disagree about, and I just had to make note of it.
You said, "Shotshell presses resize the metal head of the fired case to permit easy chambering..." That is certainly true, and I always resize all my shotshells even if they are usually used in the same gun.
Then you added, "For another, shotshell loads using smokeless powder are very specific in components, wad seating pressure, etc. It would be impossible to get that consistently by hand." I would disagee with the part of that statement concerning wad seating pressure. With today's modern one piece wads, wad pressure is no longer an issue as long as you insure the wad is seated on the powder and the rest of the load fits the shell. I never loaded shotshells by hand, but I would thing modern shells with modern wads and powder would be relatively easy to get consistent loads with a Lee hand tool. If the powder and shot were weighed for each load, they would probably be more consistent than machine loads.
That's it. That's the first thing I ever saw you post that I thought you might be wrong. However, since I never loaded shotshells by hand, I am prepared for you to explain something to me that I was unaware in the hand loading process.
I did once load a box of 3-40 Krag ammo with a Lee Loader hand kit, and I never did that again. I occasionally load a few calibers with a Lyman 310 Nutcracker tool, but that is a walk in the park compared with the old Lee Loader process. Now that I think of it, the Lee Loader involved pounding things with a mallet instead of the more controlled features of a press, and that difference could make for less consistent loads. A 310 Tool can be kind of neat when you are feeling old fashioned, but the whole idea of loading ammo with the Lee Loader just makes me cringe.
Everytime I see a thread and find you have already made a comment, I always think RC has hit the nail on the head, and I usually have nothing to add to your comments. This time I thought I might have a different take on the idea of making consistent shotshell hand loads, but I am prepared to learn something different. I know I would not want to load them by a hand tool, but I thought it could actually be done with consistent results with today's components.
Best wishes,
Dave Wile