I understand that fully. But, with the powder I use, and how mild I am loading, I can't see how anything could go bad pressure wise. I could understand if I was using a really fast powder where a little bit of variation could mean a huge pressure spike, but CFE isn't all that fast, and I'm starting out well below what I've found as a good load.
I found guys reporting (and load data is always taken with a grain of salt, which is why I always drop it a bit) that they were running this exact bullet, 165 grain xtreme, with 3.6 grains of CFE. Another guy stated 3.5 gave him the best results.
I'm not trying to sound like a know it all and not listening but with the components I'm using, I feel that there isn't a risk of loading a round that will be over pressure. Or should I say, a starting round that is over.
If 2.8 grains cycles the gun reliably and doesn't show any signs of of over pressure on the brass, then I'll stick with that. My goal is to use as little powder as possible to obtain a round that will shoot good and cycle reliably. Cardboard doesn't seem to care if I meet a certain power factor. And it's not what I use for training. Just fun.