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  1. P

    Swiss K31: Stunning

    Judging by the BC numbers, Hornady ELD-M 178 should be the best match for the 1980s-1990s production GP11. This said, the GP11 projectile undergone several changes since its introduction in 1911, and the K31 iron sights beyond 600m or so do not match it very well neither.
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    Labrabaco: a G7 BC calculator from Labradar tracks

    That gives an average of 0.2856978, which fits the manufacturer's data to 0.8% Sweet! What kind of cartridge it is? And, by the way, do you run a EU-castrated Labradar, or a full-power Canada/US version?
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    Labrabaco: a G7 BC calculator from Labradar tracks

    Thanks! On my side, I no longer have access to anything beyond 300m until March-April, when snow melts off the roads that lead to the mountain ranges. But I will run a few tests at 300, and also do some "armchair ballistics", to see how RA4 BCs compare to Lapua's Cd trajectories; will share it...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    Sweet, thank you. I must say I am pretty glad of the results that can be obtained. (Of course, Labrabaco is by far not as accurate as industrial radars over longer distances, but for some manufacturers (did someone say Norma? Ruag?) that can be an easy fix, and a good starting point.)
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    Labrabaco: a G7 BC calculator from Labradar tracks

    re: 512 -- I am very curious whether the RA4 model gives more accurate predictions than G1 ? Would you mind checking it, by setting RA4 model in Labrabaco, and feeding it the same Labradar data. Then we could see if the resulting BC, introduced in JBM or Strelok Pro with RA4 model, better fits...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    Cool! That is very close to the manufacturer's data, and certainly close enough for all practical applications. Did you have a chance to shoot longer distances (e.g. 300+ m/yd) with this cartridge? How does the trajectory compare to the BC numbers?
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    Labrabaco: a G7 BC calculator from Labradar tracks

    v.0.8 is out, now with the taste of RA4, G1, and, while I was at it, G8. (The default is still G7.) Still at the same place: https://bc.geladen.ch/labrabaco/labrabaco.html All you ever wanted to know about long-range ballistics of your rimfire trainer... JBM and Strelok Pro (probably some...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    re: precision of 16" vs. 9" rifling – honestly I could not detect any significant difference. I mostly shoot the subsonic 40 gr ammo (to avoid the unpredictable transonic), and up to 500 m different good .22 rifles shoot pretty much the same. In terms of precision, different rifles seem to...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    re: difference between 1x16 vs. 1x9 – are you talking about twist rate? I would guess so, yes, it would detect and show the BC difference. The problem, as you said, is the limited measurement distance – in the case of .22 cal, valid data goes (with my EU-castrated box) to 50-60m, not much...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    beta v.0.7 is out, now available: https://bc.geladen.ch/labrabaco/labrabaco.html The major change is noise filtering. Most people who have plotted Labradar tracks in spreadsheet software, must have seen occasional tracks of this shape: The tail of the graph -- beyond 60 ms -- is obvious...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    What is important is the distance between the barrel axis and the radar beam axis (and, of course, that these axes are as parallel as possible -- the barrel and the radar should point at the same distant target). So -- yes, left-right of the barrel, not the distance to the muzzle. If the muzzle...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    The most likely reason is that Excel screwed up the CSV format at saving (introduced quotes around values, changed the delimiter, etc.). Deleting the last few lines of a track file should not be an issue. By the way, I am now working on an automatic filter to disregard weird data points in the...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    Another thing to check then is the distance from the muzzle to the radar. It needs to be as close to the device settings as operationally possible. See https://geladen.ch/en/tips-to-set-up-labradar-for-the-most-awesomest-results/ I found the BC calculations to be more sensitive to errors in...
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    Labrabaco: a G7 BC calculator from Labradar tracks

    This might sound like a silly question, but how sure are you of the conditions? Most importantly -- the temperature. A sunny day vs. a cloudy day can make a very significant difference in thermometer readings.
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    Subjective bad light test: 2xS&B vs. 1xKahlesK vs. Philippino Vortex vs. Chinese Vector

    The SB 3-12x did not actually perform poorly -- it's still excellent optics, totally bulletproof. I have mine for maybe 7-8 years, and I have shot with many other such scopes (it is one of the most popular models in our parts, since the army has adopted it around the turn of the century). For...
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    Subjective bad light test: 2xS&B vs. 1xKahlesK vs. Philippino Vortex vs. Chinese Vector

    Thanks!
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    Subjective bad light test: 2xS&B vs. 1xKahlesK vs. Philippino Vortex vs. Chinese Vector

    You're welcome! Glad you find it useful.
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    Subjective bad light test: 2xS&B vs. 1xKahlesK vs. Philippino Vortex vs. Chinese Vector

    Thanks! It is beautiful indeed, wish I could spend more time there (I live in the suburbs in lowlands, much less spectacular).
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    Subjective bad light test: 2xS&B vs. 1xKahlesK vs. Philippino Vortex vs. Chinese Vector

    In the recent years very decent optics got much more affordable. I have always been very conservative, as far as optics go -- bought expensive, proven models, and kept them for a long time. But since quite some time I started wondering whether high-end models available here in Europe are worth...
  20. P

    Labrabaco: a G7 BC calculator from Labradar tracks

    Thanks!
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