Ok, just clarifying, I apologize if I read too much into what you were saying. They are both important, which is what i have been saying all along. I bring it up because there are plenty of shooters who load develop on group size only, then record drops to get velocity data to input into their ballistic programs. In fact, most hunters I know dont even gave a chronograph.
That can lead to inconsistent results, and Im trying to get more shooters to recognize the importance of their velocity data. I think it is one of the main reasons I see people making lots of adjustments to BC in their programs and otherwise having a hard time making their real world data fit the program-their data points dont line up because of inconsistent loads. If you spend time getting accurate, and consistent, velocity data then the various ballistic programs are remarkably accurate.
This leads to the first round hits that are critical for long range hunting.
In any case, a 3.8 agg is amazing shooting, really. There are some talented people here for sure, and you obviously know what you are doing. I was just pointing out that it is not the norm to shoot long range groups of that size with 40 fps spreads, and that others should not expect to duplicate thise results. Obviously, something else, such as what Bart pointed out, is compensating for it.