Labradar Question

[Fuj]

Once you move on to the next series , the previous series is closed.... You can of course go back and review but you can't add shots...

You are correct. Once you start a new series, you can go back
and check the previous series. If you arm the system when viewing
an old series, it will default to the new series that was started and
just display "VO"

 

[divingin]

Easiest way to do it is, do an individual series, but don't lose track !!
Fire your first five then start a new series for each individual charge.
I do this quite a bit testing powders.

If you use the app to control the LR by phone/tablet/whatever, there is an option to annotate the series. I usually do it when creating the new series, and label it "barrel/charge/bullet".

Note that the label is only retained on the device on which you name the series; it does not get written to the LR at all, and will not show up if you change remote devices. With the remote device, you also cannot view series without having the LR connected (at least I haven't figured out how to; seems kind of stupid considering how long it takes to transfer data every time you connect.)

Labradar Manual (bluetooth): https://mylabradar.com/wp-content/uploads/2021/12/User-Manual-V1.4-Labradar-EN.pdf

Labradar Lite manual (no bluetooth): https://mylabradar.com/wp-content/uploads/2022/06/2022-avril-labradar-user-anglais-low.pdf

 

[Dimner]

I’m new to using the Labradar and have a question. Tomorrow I am doing a powder load development. I’m shooting six different powder charges, with five shots on each one. I’ll be shooting round robin through them, one through six, then again and again five times. My question is, could the Labradar be set up with six different series of shots, one for each charge weight, so that I would just toggle between each series, for each shot. I would wind up with six series, with five shots on each series, that would provide the data on each of the series; es, sd, etc. I would prefer this to shooting one large series with all the shots within that one. I can do it manually, but I was wondering if the Labradar could do this?

I know this is kind of confusing, hope you understand what I am asking. Thanks so much.

That won't work. I wish it did.

It will only write to the newest series. Older series cannot be added to.

If it were me I would do your test all in one series keep notes of which shot is which load. Then when you DL your data. Make X number of copies of the series file. X being the number of loads. Then in each file delete the shots that do not belong to the load. To get the right SD and spread just use excel functions.

 

[Timon]

What I believe is that nothing we do in the reloading and/or shooting process is without major bias. In fact, every single thing we do is aimed at producing the smallerst possible groups. As such, we are not looking at the same width distribution curves (i.e. sigma) that one might expect from a normal distribution. Because of that, I don't believe shooting "round robin" style really accomplishes much of anything that can be considered a statistcal "improvement", or somehow better than, simply shooting one group and then moving on to the next. Issues such as barrel heating can be addressed without resorting to using a round robin approach. If anything, I think shooting round robin style might actually make groups worse than they really should be, if for no other reason than due to the lack of continuity and/or focus associated with shooting a single group all at once. But that's just me.

My point above was simply that if you dislike the added effort of separately tabulating and analyzing the velocity data from different files because of the round robin shooting method, I don't think it would hurt you to shoot successive groups and thereby get away from having to do that.

I think that in reading everything, I will shoot the first series, let the barrel cool down, then shoot the next and so on. I do see your point about the “round robin” approach possibly creating larger groups, I had never really thought about it in that way.

Thanks for your input.

 

[MislMan]

Shoot all in one string. Download to Excel file. Add a column or row next to the shot string and annotate each shot velocity with a number to be used for sorting (1,2,3). Sort on these number identifiers and you’ll have a top to bottom list of shot strings.

 

[Ned Ludd]

I think that in reading everything, I will shoot the first series, let the barrel cool down, then shoot the next and so on. I do see your point about the “round robin” approach possibly creating larger groups, I had never really thought about it in that way.

Thanks for your input.

That is how I do it and it seems to work just fine. The barrel will obviously warm up a bit, but shooting a single group isn't enough to heat it up that much and I don't ever allow it to get anywhere close to screaming hot.

 

[jepp2]

Chris I’m trying to learn Excel now so that I can set up some of these things.

Feel free to use until you get yours setup.

 

[Timon]

Shoot all in one string. Download to Excel file. Add a column or row next to the shot string and annotate each shot velocity with a number to be used for sorting (1,2,3). Sort on these number identifiers and you’ll have a top to bottom list of shot strings.

Thank you so much, but I’m just starting to learn Excel. I’m 70 and not a real quick learn from a book. A friend is going to give me some one on one time with the program. Then I hope to really be able to chart some numbers.

Feel free to use until you get yours setup.

thank you so much, I really appreciate it!!

 

[Ned Ludd]

Thank you so much, but I’m just starting to learn Excel. I’m 70 and not a real quick learn from a book. A friend is going to give me some one on one time with the program. Then I hope to really be able to chart some numbers.

thank you so much, I really appreciate it!!

PM me if you have questions, I am happy to help out in any way I can. Some of this stuff may seem daunting, but it's really not so bad if someone is willing to talk you through it.

 

[Chris Edmondson]

One thing to note: If data is transposed with Excel, the data source matters. The velocity numbers shown on the Labradar LCD screen, and the app screen, have been rounded to integer numbers. The raw data these values are based on are more precise; 2750 fps may really be 2750.313 fps, or something like that. This may lead to Excel results which don't quite agree with what's shown on the LCD or the app. The sdcard numbers I believe, include the raw values. In any event, it probably only matters to us OCD types, lol.

 

[Timon]

One thing to note: If data is transposed with Excel, the data source matters. The velocity numbers shown on the Labradar LCD screen, and the app screen, have been rounded to integer numbers. The raw data these values are based on are more precise; 2750 fps may really be 2750.313 fps, or something like that. This may lead to Excel results which don't quite agree with what's shown on the LCD or the app. The sdcard numbers I believe, include the raw values. In any event, it probably only matters to us OCD types, lol.

Thanks, that would matter to me!