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meles meles

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  1. meles meles

    Moly Coated Bullets (Why)

    Some intriguing points raised there. From a metallurgical point of view, we'd expect that a well applied coating would protect the barrel from erosion, corrosion and tribological wear but of course the devil is in the detail. It'll be interesting to hear from those with real world experience of how they perform.
  2. meles meles

    Velocity plateaus in load testing: Why?

    But if the answer is incorrect, the money is wasted nonetheless... As an aside, it's worth noting for a moment the wealth of knowledge and skill made freely available on this forum. We have some awesome gunsmiths in the likes of Baldie, Ronin , Bradders et alia, excellent shots too, people like Laurie who contribute decades of hard learned lessons and experience. Not everyone agrees with everyone else all the time, but that process of challenge and questioning is how we progress.
  3. meles meles

    Velocity plateaus in load testing: Why?

    We have some tekkernickel knowledge about large bore rifles and how to tune those for extreme accuracy (i.e. choosing which rivet to hit on a tank a few French miles away) but as has previously been stated in this thread, once one comes down to small bore arms then things get exceedingly non-linear with the slightest fluctuations / changes in apparently almost irrelevant factors showing that they do indeed have an effect and ought to be considered. As an example, thermal expansion of the barrel and a change in its internal diameter will influence accuracy within a string of shots. How important that is depends upon how good a shooter you are: other errors may mask it but it doesn't go away and can combine with another minor factor to suddenly create a significant effect. Once you start to try and optimise accuracy to the degree some people here desire, then you really are well into the field of statistics: i.e. is what you measured actually what you think you measured and relevant, or something different entirely that you aren't even aware of as being important? No two shots will ever be the same. Two shots in and of themselves are not usually statistically relevant. In the search for the 'velocity plateau', one would be better firing ten shots at each of many, many charge increments, with an exceptionally accurate chronometer, cleaning the barrel to an identical regimen between each shot. Whilst you are doing that, a team of analytical chemists and metallurgists can be preparing each individual round of ammunition for you using lab quality equipment and producing an error audit. Meanwhile, a team of naturalists can go out and talk nicely to all the flutterbies for miles around and ask them politely not to flap their wings for the duration of the experiment. Let's assume that each round of ammunition is produced with a combined error audit of less than 0.1% in weight, length, concentricity and chemical stability, each shot is fired in a barrel whose surface roughness varies by less than 1 micron, along its entire length, for the whole series of , say, 1,000 shots, the temperature on the range varies by less than 0.1 degree Celsius over the same period, the wind speed changes by less than 0.01 m/s, wind direction shifts by no more than 1 degree. Your results, at each 0.1 grain charge increment, show a velocity variation of 3 fps with a standard deviation of 0.2 fps. Mathematically, have you actually shown anything or is it just random variation ? We can do the lab work, but in the real world, we just watch agog as the likes of Baldie and select others on here shoot far tighter groups in 'orrid winds and rain, the sun in their eyes when it deems to show up, and they don't even talk the flutterbies into holding a truce. As Bradders might suggest, Quickload etc are valuable tools that can point you in the right direction, and OCW and other practical techniques can refine things further, but ultimately its the skill of the shooter that counts. Experiment to get you close, then go out and practice. And practice. And practice. You get luckier that way ...
  4. Such rifles are available from baldie's factory, each one a superb bespoke hole puncher.
  5. Dalek Plinky Plonkers? Exactly what does that mean?
  6. meles meles

    bolt action .224 Valkyrie

    Excellent looking bit of kit, and almost certainly a shooter as well as a looker. We're also going to keep an eye on Dave's exploits with this. When .224 V was introduced we felt it was just more marketing hype to sell into the .223 market but from the results we've read so far it does look a genuinely useful new cartridge. As an afterthought, what is the availability of brass like for .224V now? Any particularly good bullets recommended for it?
  7. meles meles

    Burn Rate Chart?

    pdf version attached Relative_Abbrenngeschwindigkeit_Export_Feb._2018.pdf
  8. meles meles

    Burn Rate Chart?

    Google is your friend, ooman, but how about this for now? https://www.lhs-germany.de/fileadmin/media/Mediathek/Pulver/Relative_Abbrenngeschwindigkeit_Export_Feb._2018.pdf
  9. Scurries away to investigate...
  10. Nuffink wrong with Bren bipods, ooman. Then again, there's a lot wrong with you bipeds...
  11. meles meles

    television??

    We's rather partial to good cask ale and Skottish falling down water, ooman. Don't believe everything Chris Packham tells you about us. He's just out to promote his own brand of cough lozenges...
  12. Or midnight black, with ΜOΛΩΝ ΛΑΒΕ and an infra red torch for the Walts?
  13. All it needs to be really Tacticool is a quick spray with Flat Dark Earth...
  14. meles meles

    television??

    Oh no, we have had our doubts about you bald monkeys for years. Our chief naturalist, David Attenbadger, reckons you'll be extinct in a few generations.
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