1-Determining accuracy potential using 100yd groups with a high BC bullet
2-No seating depth tuning
3-no powder charge adjustment
So how did you decide on that load if you don't tweak?
This is definitely a new approach
I used to do ladder tests, mess with seating depth, change primers, etc. I listened to the hornady podcast series "your groups are too small" and started reading about others actually testing results.
Turns out, a 3 or even 5 shot group is not very repeatable. One may be 0.3", the next 0.9", etc. leaving you to believe something has changed between those two loads.
In reality it's just too small of a sample size to see a true difference. I chased my tail trying to dial in the perfect combination when in reality, there may not actually BE a difference in group size based on incremental powder charge or seating depth change.
At least with the cartridges I've been loading for, I end up with excellent results by just seating a bullet "a ways" off the lands or at mag length, 1gr below max, and shoot a larger group.
If it's not shooting well or not reaching my velocity goal needs, I change bullets or powder. Bullets seem to matter more than powder at least for me.
If my group is 1"-1.7" depending on the gun…it is absolutely not going to be the cause of a miss. Some shooting disciplines may require higher level of precision..most probably not. I shoot a lot of steel out to 1200 yards or so but my goal is on game effective to 700 yards or so in good wind conditions. (It's going to be the wind that causes a miss).
It's a lot to get into here but check out the podcast, some incredibly compelling data they show with rail guns and huge volumes of shooting.
So far it's working quite well for me and I spend more time practicing wind calls and field shooting positions than tinkering at the loading bench. I'm a much better shooter now than I've ever been.
Accuracy potential at 100 I just shoot a large volume…10-20 shots or multiple 10 round groups. Too many variables at long distance but I do like to see my splashes stacked in there on the 1000 yard steel