If I were to read the forums, here and elsewhere, it would seem that the method to work up a load is to start in the middle of the data and then work up until your gun starts doing fucked up things to your brass. What's the deal with this advice? I
I confess—I load nuclear 10mm when loading 10mm, because that's how one should load 10mm.
...but for rifle, are you sure you're reading 'work up until your gun starts doing foked up chit to your brass' and not working up until you see the slightest signs of pressure, then back down to a safe load, simply to know your upper and lower bounds and keep you out of trouble?
For example, with 6 Dasher, some books cap (Sierra especially) at like 2500fps, which is ridiculous slow even for a BR. So I would work up until I see a very faint ejector mark/feel a slight heavy bolt lift/start to see the primers flattening, etc, etc...just to know where the red line in the sand is drawn, then back down to a place where a few extra kernels here and there and some dirt in my chamber/rainy conditions isn't going to push the pressure envelope. That becomes my 'max' and I search for the best load lower than that. It's the first thing I do with any new caliber.
In terms of the Dasher, I hit 2980 with zero signs and could have continued stuffing a few more tenths in there easily and been safe, but I wanted to be slower than that, so took the best load between my new min/max @2860fps and never looked back (and have a load in the 2700s that rival that load). But at least I know where I am on the pressure curve, per se, and will never have an issue.
...but I wouldn't recommend settling on 2500 or 2600 or 2700 when your bullet/barrel/powder combination could reward you if you had continued searching for what it liked to eat and could have starting shootings 0s/1s @2950fps with zero signs of pressure. You won't know when you stop at book max that is sometimes drastically understated for obvious reasons.
If I switch powders, I do another truncated ladder and see if I can reach the same upper threshold with no pressure signs and know where to start (and end) load development.
I am not saying I recommend people try to run their 6 dashers at 6 creed speeds, and I hear what you're saying and completely agree that if you are pushing the envelope, move up a caliber to where you are trying to be...but finding pressure has it's place in reloading for sure.