Well I annealed a batch of 50 and came up with a few more questions. How much inconsistency can you have with the heat/glow before it matters? I had some variation in how red they got and for how long. All had about the same amount of faint discoloration down the case body. There was one case that the neck and shoulder glowed a bit, and the discoloration ran almost halfway down the body. Should I be worried about that case?
Also, I think you're right about the collet die being trash. I haven't verified it yet, but I'm afraid the die may be sizing just a hair past the neck and into the junction based on faint collet marks. While seating into the annealed cases I'm still getting a slightly tight spot at that junction. I think I'll try to shim it until I get a new die.