You can't assume that the data in trhe manual applies to
1. Your cases
2. Your primers
3. Your bullets (which differ from the manual quite markedly)
4. Your chamber dimension
5. Your lead length and bullet jump
6. Your barrel
Like why does a certain (fixed) drill size and certain (fixed) screw size have different torque requirements to screw into different pieces of wood.
So you get a starting point - closer to minimum than maximum. Start a few loads and look at what you see. If you are running faster at the minimum than the book (or for whatever given load), then your combination will top out lower too. You are then running a "tighter" (best description I can come up with now) combination of components affecting pressure than the book is. It could be any one or a combination of those (and other factors).
Your velocitites are way higher it seems than even the manuals you refer to - even if the bullets aren't quite the same. I'd suspect you will reach max at a lower charge. Your data seems to show that.
Look at the data I shared - 76gr is close to MAX - not in the middle of the range. If you get much over 2850 I'd suspect you are over what you should be. Not that I'm superbly knowledgeable on this stuff, or know nearly as much as many others here. I was told by the guys here at Somchem that for a given propellant the pressure/velocity relationship is linear (or something along those lines). Basically, in short, what Dave said - for a given powder if you are getting way more than everyone else is, your pressure is also more (from what I understand).
Very wide ES's (high to low) are indicative of high pressure, I'm told - if it's near a top load.
At what point did you go over 100% load density? You don't say, but from the other data you gave I'd guess some of your loads are compressed too?
A 210gr at 2800 is quite decent load. I'd try to load for that. Think of all the powder you'll save ;-)