Group size / width and height measurement.
This issue is that the group analysis boxes (let's call them blue boxes) have previously had separate width and height measurements. In 1.09 I changed it to be group size (extreme spread, two furthest shots). A lot of people asked me to change it, and now a lot of other people are asking me to change it back.
I am trying my best to cater to everyone. If it's important, I'll put it back. If you really, really want something unique, and it's easy for me to do, I can just take 20 minutes and package you up a custom version of the software. Anything is possible, but before I open a can of worms for custom software for everyone, please keep in mind there are a lot of people that ask me a lot of different things and I have to say "yes" to some and "no" to others based on trying to manage my time.
Let's cover how the system actually works. The "Stats" option controls what number is displayed next to the notebook at the top. This is a single measure of the entire string, including all shots on record (not sighters, not hidden). This options have always been "score" for competition and "inch", "moa", "mil", or "mm" which gives you extreme spread group size in that unit (primarily intended for benchrest, where a single group covering the whole target is scored).
Later, for load development, I implemented the blue boxes. This system lets you draw one or more boxes around some shots and it will measure only those shots. Each box has its own little set of numbers. I did not put group size as extreme spread here. I chose width and height because at the time it seemed like an interesting alternative to group size, and group size was already calculated in the main "stats" display, even if for the whole target.
The boxes use the unit you have selected in "stats", or "inch" otherwise. So if you want to see "moa" here, select the "moa" option.
In hindsight, it was a mistake to not have ES, because most people would want group size calculated as ES, because that's the way it's usually done. I got so many emails asking why I don't have group size here. My response was that, "yes, you're right, but you do have width and height, so it's OK for now and I'll figure something out for the next release".
I'm pretty sure if I had put ES group size here from the start, adding separate width and height wouldn't have been expected, since that's sort of an advanced measurement. If anyone did ask for width/height I would have said to use the CSV since it's pretty easy to calculate in Excel.
I'm not trying to create advanced software for measuring and analyzing groups, I'm trying to offer some useful data for you to make quick decisions at the range, without too much clutter. Also also, for record keeping purposes, to have some numbers that complement the actual display of the shots, since these numbers will always be displayed right next to the actual group, so they shouldn't be redundant.
This is what I do each time I go to the range. I load 43.7 grains, I seat to 10 jump, and I fire 3-5 shots. I draw the box around them, and label it. Then I load a few at 25 jump, and shoot them, and compare the groups side by side, by eye, to see which one looks better. I can see whether the group is wide, tall, tight, or loose. The number is not really helpful, since I know that the groups are probably statistically the same, but I have to make a decision, so I make an interpretation by eye and shoot another group. Hopefully by the end of the day I will have stumbled on something that's repeatedly tight and I just keep on shooting that to prove it.
I find this method much faster, and cheaper, than loading a ladder test or many different loads beforehand. Once I see three shots spread far apart, I stay away from that load and save myself all the ammo I would have wasted into that group. Groups don't get any smaller if you keep shooting.
It was a fairly easy decision to drop width and height and put ES in the box instead. That's what people were asking for, it's closer to the standard method of measuring groups, and one number is better than two, when one will do.
When comparing or measuring groups, given a reference frame, like a 1 moa grid, then you can interpret the group size and its distribution / shape / pattern by eye relative to this grid more meaningfully than a static number, and so having separate width and height seems a lot less useful than just having one number, or even no number.
I realize it's nice to have a number for comparison purposes, but in fact if you have two 10-shot groups that are say 0.62 and 0.72 moa in ES, they are actually statistically so similar that making a decision based on that is essentially choosing at random. So I tend to base my decisions at the range on the shape and distribution pattern of the group, in an effort to learn something from less shots when I know that numbers would only be deceiving.
So, having said all of that, I would be open to putting back width and height. The problem is that having to add two more numbers to the box would make it larger, more cluttered, and I think it's already too big, and challenging to avoid covering shots in adjacent groups. I also need to reconsider having velocity average, SD and ES in this box. I'm struggling to decide what this box is and should be used for.
I'll show you a picture from my last day at the range. This was with 1.09 software. It's a mess, with two shooters and two brand new barrels we were working in and doing some initial testing on. I'd like to see what you all think if the box with numbers should bigger, small, less, or more.
Try to put yourself in the shoes of the typical person who would use the blue boxes, and what numbers they really need, keeping in mind that anything crazy advanced can be done in the CSV, and isn't worth the clutter on-screen for the majority of shooters.
All of your feedback is much appreciated.
Adam