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  1. P

    Best Ballistics App 2025

    :) I should have said “with a given definition of ‘scientific discovery’”. I seriously doubt you guys are developing, say, a new CFD turbulence model, just for airgun pellets. This said, the subject is extremely interesting. A few people I know in the UK, who are stuck with airgun Field Target...
  2. P

    Best Ballistics App 2025

    Then, in absence of proof, I would tend to assume "bullshit" as working hypothesis. The ballistics calculators market is extremely competitive, and they are all equally precise, give or take a rounding error. The difference is essentially made by UX/UI, or electronic ecosystem integration with...
  3. P

    New Applied Ballistics® Quantum™ APP! - & It's Free!

    Understood. Just posted the request through the app, along with all attached diagnostics info.
  4. P

    New Applied Ballistics® Quantum™ APP! - & It's Free!

    Thanks! Just tried all that: - Logged in for Cloud sync using the same Google account as used for Play Store - Checked the app, "Subscription level: Ultralight" - Restarted the device - Checked the app, Cloud sync logged in, subscription level is still "Ultralight" - Completely removed the app...
  5. P

    New Applied Ballistics® Quantum™ APP! - & It's Free!

    Thanks for your quick response! I have purchased the app many years ago (I remember we had an exchange re: bug in unit conversion from archaic to metric for wind speed in one of the early versions), but I have never registered for a cloud sync. Do I still qualify for the “+” version? If yes...
  6. P

    Best Ballistics App 2025

    Interesting. Could you please ask him for patent numbers ? (because if it is patented, the actual substance should be publicly accessible -- that's the whole idea)
  7. P

    New Applied Ballistics® Quantum™ APP! - & It's Free!

    The automatic "upgrade" from the previous AB app to the "Quantum" version has been quite a disappointment. The change of pricing model is quite an annoyance in itself. I paid the old version with the idea of “pay once, use forever”, and it had all the features that I need. The “upgrade” brought...
  8. P

    Best Ballistics App 2025

    One that is missing from the list is Lapua Ballistics – a very decent app, with a clear and straightforward interface, and an added bonus of true 6DOF goodies for Lapua bullets (which I mostly shoot anyway). This has become my “go to” app ever since Strelok Pro got tricky to install, and AB...
  9. P

    Best ballistic calculator currently?

    The 6DOF bits only apply to Lapua projectiles, which they have data for. In practice, this means accurate spin drift calculations (significantly more accurate than Litz's formula, which everybody else seems to use), and accurate predictions of transsonic stability. Other than that, it is just...
  10. P

    How To Use Custom Drag Factors(CDF)

    Thanks! So it's basically a Cd value multiplier (the same for the whole custom Cd/Mach curve).
  11. P

    How To Use Custom Drag Factors(CDF)

    Just out of curiosity, and for my personal understanding: technically the CDF is just a BC multiplier, correct ?
  12. P

    Another Picture Thread - All Other Semi-Autos

    The 3-lug "K" is a beauty indeed! HK? Functional full?
  13. P

    Another Picture Thread - All Other Semi-Autos

    What a beautiful piece you have here! I just love the wood furniture!
  14. P

    Another Picture Thread - All Other Semi-Autos

    'fcourse not. As it is written: "Then, shalt thou count to three. No more. No less."
  15. P

    Another Picture Thread - All Other Semi-Autos

    if I may adventure a question -- what is the AGOG you've put on it, and why ?
  16. P

    Another Picture Thread - All Other Semi-Autos

    The third brother has arrived. I've been hunting for the original, uncastrated full-auto Stgw57, for a few years now, and finally -- here it is! Top to bottom, all original full-autos: - Swiss army issue Stgw57 - German contract FN-FAL, the army issue G1. Alas, not the border guards (or...
  17. P

    Another Picture Thread - All Other Semi-Autos

    I do not have much experience with the SCAR 17 – maybe 100 rounds shot prone at 300 m at our village range (not further, and not dynamically), so can't really state anything conclusive in that sense (SCARs in our parts are just insultingly expensive). As compared to the HK 417, it is pretty much...
  18. P

    Another Picture Thread - All Other Semi-Autos

    Now that's a rackful of Insane Beauty! Love the 34s! And the M2, but of course, what a splendid instrument!
  19. P

    a geek’s delight: reverse engineer a distance-velocity table to Cd/Mach curve

    Re: 2000+ yards -- this is über-cool! This said, if it is not a trade secret, how would you go about, for example, Mach 0.5 for a .375 CT? Multiple radars covering subsequent overlapping trajectory segments? Extrapolation using similar shaped (but smaller calibre) projectiles? Shooting at...
  20. P

    Labrabaco: a G7 BC calculator from Labradar tracks

    For the record: I entirely agree with the opinion of Cal from PRB, quoted above, and with the unnamed "industry pro" that he is referring to. Because of obvious power limits, it is totally illusory to expect Labradar to produce meaningful data for a full bullet-specific Cd/Mach curve, or, as...
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