I think you have me started in the right direction here. Your post's have given me a place to start. But I don't think I fully understand this yet. I am going to see if I am on the right track here.
Years ago when I was handloading, I came upon what I called "throw-a-way" junk brass or junk hulls etc. These came from what I believed to be highly mass produced ammo using the most inexpensive manufacturing methods possible that would still allow them to go "Bang" and toss a mass of lead somewhere beyound the end of the barrel. These spent brass or hulls could not be reloaded for quality and physical reasons. When I use the term brass, I mean anything used to form the cartridge. usually what I call junk brass were made of some light weight and light colored metal alloy maybe recycled scrap or whatever. They often would break down and crack when fired etc. I remember I started loading as a kid at about 12 yr old and I loved to expirement. I now think I remember bending or breaking a few pins trying to remove a primer that was not removable. Once I knew which ones they were, they went directly in the junk pile. I am thinking ICC and PCI and maybe speer were some of the center fire junk. The hulls were forign names that I don't remember (Franchi and Alcan comes to mind, but they were ok I think). Anyway, I hung out at the skeet range and one knows that AA or Federal made of wax or plastic coated paper was popular to most. Remington Peters hulls were a little less common. The reason being that different wadding was needed for each brand. When you try to cripm (fold) the end, some worked well and some did not. Then came the good AA quality plastic made by all the main companies and now paper is rare. To get back on track, these primers I know were different, but I just can't remember the two holes either side. The 3 claw idea is ringing my bell. Is this a common primer choice on both brass and hulls? Maybe I need to drag out some of my old loading boxes and take a look, but they are so antique, maybe that won't help me.
If I were to say, in General, the difference being a primer that is easily removed is a boxer and the empty case can be commonly used to reload? And that the cheep throw-a-ways are of the Berdan type?
The more I think of this issue, I should use my resourceses here online to do some ammo research. I am sure there are photo's and drawings that will clear this up in my mind. Also, I will take note the next time I am at the range. I will pick up some of the junk and compare.
Sorry I am making this into such a long post for such a simple matter. I know this is the best place (this forum) to hang out and learn.
I still have a few problems with the forum codes. What is IIRC? I haven't figured this one out yet, along with some others. Is there a forum accronmn(I need a websters for spelling too) refrence table somewhere that explains the shorthand lingo used here?
Thanks again, and please keep the responses comming, I will learn someday.