Recent content by BryanLitz

  1. BryanLitz

    Applied Ballistics "ELR Central"

    We're currently working on gathering content for the ELR Central website. Can everyone please reply with any known details of currently scheduled ELR matches or record setting events. If you have a match program or event webpage simply post a link, otherwise I'll need to know; who, what...
  2. BryanLitz

    Range Report Debunking Courtney's stability myths

    Thanks for the comments and support guys. Honestly, I have no intention of this turning into a slugfest/reality TV drama. I hate that shit too. My goal here is to share my thoughts on the Courtney stability papers in one post, so it can be linked to from other places where it's being...
  3. BryanLitz

    Range Report Debunking Courtney's stability myths

    In recent years, Michael Courtney has posted a number of papers on this and other forums which present modifications to the original Miller stability formula for things like plastic, aluminum, and open tip match bullets. These papers make some claims which are based on faulty reasoning and...
  4. BryanLitz

    Range Report Can velocity compensate for twist rate?

    Stability can be a very difficult thing to nail down and see consistency across the board, especially when looking at 'recommended' twist rates. All recommended twist rates are based on multiple assumptions including: What is considered an adequate stability factor? Usually 1.2 to 1.5 is...
  5. BryanLitz

    Range Report very fast twist rates??

    As a rule of thumb, you could say that 35 calibers/turn is normal, and 30 calibers/turn is fast. For example, a .308 barrel that's 35 calibers/turn is .308*35 = 10.8" twist. A .338 barrel that's 35 calibers/turn is .338*35 = 11.8" 35 calibers per turn is what you'll typically find, as a rule...
  6. BryanLitz

    Range Report Can velocity compensate for twist rate?

    Velocity improves stability, all else being equal, but not very much for small changes in velocity. You're correct that the time rate of spin (RPM's) stiffens the spin axis, but there's an offsetting effect of velocity as well. As velocity increases, the aerodynamic drag force acting on the...
  7. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    Mikey, I don't answer to you. You claim to be a ballistics expert who's "published more than anyone else...". How about you try READING some the published works by others on the subject before you question their conclusions. My study of transonic stability and drag is based on careful and...
  8. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    I've seen you define 'rabbit trails' in the past as subjects you prefer not to discuss anymore because someone called you out on your BS and you would rather not talk about that anymore. So, again, it's the old: On to child sacrifice! routine again. Courtney vs. the heathens - The Tech...
  9. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    More twisted facts. We KNOW bullets tumble for SG lower than 1, and not for SG greater than 1. That's actually a definition. What I'm questioning is the validity of your data points which are created in stability conditions which are different from what the bullet actually flies with on a...
  10. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    OK, here we go again. You make this claim several times, but the truth is, you don't know what the stability level was of these bullets. The Miller formula (and its variants) are based around 2800 fps, with a correction factor that's good for small variations in Mach. The velocity...
  11. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    This is a good example, let's consider it for a moment. So you measured the drag of a bullet at Mach 1.36 (~1517 fps), probably over 100 or 200 yards. My question is; what barrel twist did you use to test the bullet at this speed? As a bullet slows down on a long range trajectory, its...
  12. BryanLitz

    Range Report 7mm Rem Mag 180gr VLD vs 180gr Hybrid Target

    The VLD's are the hunting line, made on the thinner jacket intended for hunting expansion. Target bullets such as the 180 Hybrid are made on thicker jackets and not verified for hunting. Having said that, straight up, Personally I would load the 180 Hybrids for hunting because the hybrid...
  13. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    Michael, At this point, it's no longer a question of honesty. Berger and I have been forthcoming in all of your questions. There's nothing more to discuss. At this point, it's a matter of when you'll stop trying to piss in shooters' ears and tell them it's raining.
  14. BryanLitz

    Range Report Which Published Berger BCs Are From Predictions Rather than Measurements?

    Awesome quotes! Yours perfectly describes what's happening here and I couldn't agree more. I think I'm going to print and frame the Roosevelt quote.
  15. BryanLitz

    Range Report Nosler LR Accubonds: BC testing results

    whoa whoa whoa... don't get carried away! The BC's shown for these bullets (.316 and .337) are the maximum potential BC's, assuming full stabilization. You can't improve BC beyond it's fully stabilized value. You can degrade BC by not spinning a bullet fast enough, but it only gets so good...
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