I have been playing with OBT stuff for a while. The newest version I have done is combining a couple data sources. I learned at shot show an easy way to find the area to shoot is to find a safe max (front side of max, not in it) for your rifle and back off 1.5 grains +/- and it will shoot around there. I took this a step farther. I captured velocities (labradar) during pressure test and then trued Quick Load. I found a .5 (I think it was actually a 4.5 node in calculator) barrel time that matched around the 1.5 grains back from my safe max and it shot great. This node seems to work in most of my rifles. The only one that was on the whole# node (4/5 don't remember which off top of my head) was the 338 Edge.
For number example, I shot up to 44 grains of RL16 in my 6.5 creed with the 144 LRHT. I had a mild stiffening of the bolt at 43.5 (not super significant, but I noticed it) and half moon ejector mark and mild bolt click at 44. I called 43.5 safe max. Looked around 42 for barrel time. 42.2 OBT matched. I ran that. Was 2905 with a .6/2 SD/ES numbers. Shot it at distance and ran great. Was not a great group at 100 but sub moa. (so it can be refined if desired) I fired 8 shots in pressure test and matched the OBT from there. Fastest load development ever. I have done this with 4 rifles now and it has worked every time.
Out of curiosity I looked at previous Satterley tests, ran a pressure test for the 142 SMK. 42 was the load for it and it also lined up just left of center on flat spot in Satterley test. So it seems to me these all identify the same area to shoot, just a matter of how you want to get there. Also, the most important part of this is you MUST have a solid loading routine. This is a BS in BS out routine and most folks have issues with it due to not having a repeatable, solid load process. Consistent neck tension and powder drop are very important for these development systems to work right.