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  1. P

    TRASOL vs Strelok Pro

    Just to close this conversation, as it is getting late, and it's been a long day here. re: "And no, Weibel never said or wrote down that their radars can trace a 5.56mm up to 3000 meters, that's you misreading the technical info, so please do not try that move with me or anyone else, you are...
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    TRASOL vs Strelok Pro

    Yep. You are correct on all account. The existence of radars able to track 5.56 at 3K does not mean that everybody uses them. It just means that "1000 or 1200 yards" are by far not the limit. Also, indeed, there is no need to start your projectile at Mach 10, if what you actually want to inspect...
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    TRASOL vs Strelok Pro

    What you quote here is the specs of Infinition BR 1001, which is an entirely different unit from an entirely different manufacturer than my link leads to. "No radar can measure beyond 1000 yards, because one unit from one manufacturer cannot." Is that what you're saying? L: Logic. When Weibel...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Thanks, and you're right -- Labradar is definitely not built for the task. But when I run it against the GP90 ordnance ammo, and I get .167, while the figure derived from the Swiss Army data is .166 -- I think there may be something. Especially since the typical use case would be a situation...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    YEAH! A nerd, a geek, and proud of it :) Thanks for the encouragement!
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Judging by the references you make to Sierra bullets data, you seem to reason in terms of G1 model (this is sooo 20th century), in which the BC of real-world bullets is indeed very velocity-dependent. The G7 model, however, corresponds to modern spitzer boat tails bullets much better, and a...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    Yep, will do. I also was under the impression that 50-80 m or so of trajectory was vastly insufficient to get a reliable BC figure. Yet, when I crunched some numbers around the tracks data, I got surprisingly close to robust verified figures. Now I'd like to see if that was just a coincidence...
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    TRASOL vs Strelok Pro

    Ow, here we go again. "Wrong again, the engine is the most important piece, because with similar data you get right or wrong predictions running different engines, so being the data the common factor, all the difference is in the engine and it does not take a PhD degree to grasp such a simple...
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    TRASOL vs Strelok Pro

    I remember we already had this conversation once or twice, so I am writing mostly for other people reading this thread. "It's the engine that matters the most" is a very wrong statement. The engine probably matters the least. It took me a couple of hours to reverse-engineer Trasol's internal...
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    TRASOL vs Strelok Pro

    They're all pretty much comparable. With the computing power available today in even a low-end smartphone, practical difference is mostly defined by personal preferences for the interface, and connection options (weather meters, rangefinders) which may or may not be important. If you are...
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    [EDIT] CLOSED [was HELP NEEDED]: project to calculate BC using Labradar track data

    EDIT 2021-04-24: the calculator is available, check this thread -- https://www.snipershide.com/shooting/threads/labrabaco-a-g7-bc-calculator-from-labradar-tracks.7074446/ *** Dear happy owners of Labradar devices, As a new happy owner of a Labradar device, I could not resist playing with the...
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    Shot-to-Shot Variation in Muzzle Velocity (MV) and Ballistic Coefficient (BC)

    Thank you very much! It is very interesting to see some actual experimentally measured figures of BC variation.
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    6DOF

    Lapua's Doppler-based 6DOF has an edge over 3DOF in two points: - More accurate prediction of spin drift - Prediction of stability zone for a given bullet, V0 and rifling twist. In other words -- an indication of a distance beyond which funky things (like dramatic loss of accuracy in crosswind)...
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    Kestrel Batteries

    I had the same problem with a (~6 years-old) 4500. It was eating batteries like a short-circuit, until the day I found an option somewhere in the device's settings to specify the type of batteries -- Li, NiCd, etc. Check it out; specifying the right type of power source did make a huge...
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    Sorry to open an old can of worms for some, but should I be using Density Altitude in my Ballistics App?

    +1 to pyrotechnic, this is it exactly. as an example -- 850.0 hPa, 10°C and 979.3 hPa, 30°C have the same air density, 1.125 kg/m3 but don't have exactly the same trajectory, because, as pyrotechnic has rightly pointed out, the speed of sound is not the same If using air density, practical...
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    TRASOL

    Most has been said already. When I tested it 4 years ago, all in all it was a good app -- simple, clean and straightforward. Here's a longread on what Trasol actually does: https://guns.ptosis.ch/trasol-review Can't say anything about the new versions, since under recent Androids the app is a...
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    Swiss K31: Stunning

    Just in case, the army manual says: moving the front site by 1 mm moves the point of impact by 12 cm at 300 m.
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    Iron Sight Accuracy...

    As already said, that's a difficult question with many variables. In the best case scenario: a good shooter who knows the gear, good eyesight, good conditions and a "comfortable to aim" target -- I would expect the same accuracy with or without optics. This was proven time and again with Stgw...
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    We lost.

    Not exactly wasted, it's a different struggle, every generation gets at least one. I just hope my son's generation's struggle would not get as ugly as my grandpa's. And floating off topic -- yeah, those we the days... I arrived to Kalvingrad in 1990, right between the fall of the wall and the...
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    We lost.

    Getting back to the obnoxious EU Directive and the Swiss vote, for those who care I have written up a longread: https://guns.ptosis.ch/libertemorte It is all in French, but Google Translate does a pretty good job...
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