I would load up some more at that charge and then a few more a little higher to see if you are in the middle of the node. If all seems well I would shoot 2 5 round groups at 200 to get another feel of consistency. I wouldn't worry much about your velocity and sd or es until an accurate load is found. I keep 3 manuals on hand to reference when loading and also pull up the powder manufacturer website. Powder charge weight and velocity always very between everything but there are several factors to that.
Yeah, will probably end up running up another grain or so to see how it does.
I realize that the Chono data is fairly irrelevant to finding the most accurate load, but I'm also trying to get as much data as possible for comparison to anything I might do later.
The chase for accuracy is fun, but the information gained along the way is like crack for me. I find it all very interesting.
The chroni info will be handy to have later when I eventually start uniformity primer pockets and neck turning and experimenting with swaging.
I've already got a big binder waiting to be filled.