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  1. P

    Labrabaco: a G7 BC calculator from Labradar tracks

    Yep, the resulting BCs correspond to ICAO alt. 0 std atmo. That is why the software needs to know the conditions in which the measurements have been taken -- to make the automatic adjustment to the standard BC value.
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    DOPE issues compared to ballistics calculators

    Thanks! (I admit I'm stuck; will just hope someone more experienced finds the root cause.)
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    DOPE issues compared to ballistics calculators

    the angular error looks relatively constant with distance. this may be a [another] silly question, but did you check the (a) zeroing and (b) zeroing distance? considering the precision of your click value measurements, I would guess that you did. other things to double-check would be atmosphere...
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    DOPE issues compared to ballistics calculators

    Cool, please keep us posted. (Also -- this may sound silly, but it did happen to me -- distance measurements may be worth double-checking too.)
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    DOPE issues compared to ballistics calculators

    Check if G7 BC = 0.333 fits your data any better. That's the value I've got from recent measurements using Labradar (and I have a feeling that "official" BCs and Cd-based tables that Hornady publishes for this specific bullet are... to put it politely -- misleading.)
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Here's something: https://www.snipershide.com/shooting/threads/labrabaco-a-g7-bc-calculator-from-labradar-tracks.7074446/
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    Labrabaco: a G7 BC calculator from Labradar tracks

    Yes, it is possible. Yes, it does work. I have put together some code to calculate G7 ballistic coefficients from Labradar tracks. The tool is available here: https://bc.geladen.ch/labrabaco/labrabaco.html It all runs in your browser, there is nothing to install, and it's free and open source...
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    Ballistic Calculators - Elevation

    Almost all of my long range shooting happens in the mountains, simply because in our parts 1km+ of flat land is a too precious commodity to build a shooting range on. So... https://geladen.ch/en/inclined-fire/ may give bits of answers. and long range shooting at 40° must be extremely rare. In...
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    Any SVD Shooters here?

    Recent (2014) SVD-S-like Tigr in .308 On the range, shootout vs. the other side of the curtain: Original stock with SAG optics mount and a S&B PMII 3-20x (yes, I know, it's too much scope for this gun, but that was just to test accuracy): Later config: SAG chassis + stock In practice...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Just finished coding the prototype calculator. So far the results are very encouraging. Next step (if all goes well): the meeting scheduled in 10 days with Her Majesty Reality. 7 guns, 5 calibres, 8 different projectiles, and, time permitting, total ~300 rounds. In the meantime, if somebody...
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    Gunsmithing K31 rebarrel in 7.5 x 55 Swiss information.

    Found the drawings, for those who care. Original Waffenfabrik specs: Enjoy.
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    Gunsmithing K31 rebarrel in 7.5 x 55 Swiss information.

    Yes! That's a great point, thanks!
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    Gunsmithing K31 rebarrel in 7.5 x 55 Swiss information.

    Just stumbled on this old post; wondering if you had any luck rebarreling our favourite carbine in these past few months. (First, a disclaimer: I never did rebarrel a 31, as when one's word out, I just pick another.) This said, the main problem is not so much machining the cam at the receiver...
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    TRASOL vs Strelok Pro

    You lucky b...! That is über-cool! (Allright, shouldn't complain, to each his job.) Well, if you ever find yourself in the area again, you'd be welcome to give me a shout; there's a nice mountain shooting range about 40 minutes drive from there. Or at the very least it could be some of the...
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    TRASOL vs Strelok Pro

    I removed my answer too then. re: Overberg -- are you from ZA? (The profile says "Louisiana".) Wish I had access to a place like that; must be really exciting. I hope to have soon an opportunity to experience some of it first hand without having to travel across the globe. re: what can really...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    The distance should be ok; the trace file contains enough data to approximate the curve rather precisely, and averaging over multiple shots should level out the errors. What I am more worried about is that the device takes its readings over the very beginning of the trajectory, where effects of...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Thanks! (And don't worry, you did not come across as agressive or anything.)
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    TRASOL vs Strelok Pro

    [sorry to everyone for drifting off-topic] Allright, new day = new fun, let's study this phenomenon of LastShot300's "creative reading". Previously on our show: LastShot300 (actual quote): "Weibel never said or wrote down that their radars can trace a 5.56mm up to 3000 meters" Weibel's...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    ... and to end the day on a rather more gentlemanly exchange -- Thanks! I will post the progress here (if and when I get some data to crunch).
  20. P

    TRASOL vs Strelok Pro

    I see reality for you is never an obstacle. That's the spirit!
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