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meles meles

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Everything posted by meles meles

  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. meles meles

    7mm LRM

    Has anyone used the 7mm LRM (Long Range magnum) cartridge from Gunwerks? ( http://site-media.net/gunwerks/7LRMarticle(1).pdf ) We currently shoot a 7mm Rem Mag at moderate ranges and were thinking of stepping up to a .338 for longer ranges, but several better shooters than us have advised we stick with the 7mm until we can consistently group to 1 MoA at 1,000 yards. Swapping to .338 would make that easier they agree, but we'd learn less about reading wind and so not actually become a better shot. It sort of makes sense... That said, though we like the 7mm Rem Mag, we don't like how fiddly reloading for it can be, much of the faff apparently being related to the belt. One option we are considering is ordering a fancy die from Amerikky to resize the case, especially around the belt area. We find that after about three or four reloads the case becomes difficult to chamber - even with full length resizing. The whizzy die from Innovative Reloading Technologies ( http://www.larrywillis.com ) claims to settle all that and increase case life considerably. However, another option seems to be the 7mm LRM which claims similar performance to the 7mm Rem Mag but without the belt. Maybe that is a better option ? We'd like to stick with 7mm for the time being rather than migrate to .300 magnums as we have a good rifle, bullets and powders for this calibre. (180 grain Bergers, RS 70)
  5. Such rifles are available from baldie's factory, each one a superb bespoke hole puncher.
  6. We're looking for recommendations for a moderator, ideally one that can be used on both a .338" target and 9.3x74R hunting rifle. The .338" would seem to be the more demanding application as it could see shots being fired in rapid succession, hence a build up of heat. A steel, titanium or Inconel moderator is therefore not out of the question. Does anyone have real practical experience of these and recommendations of what is the current best option, or something to avoid?
  7. Dalek Plinky Plonkers? Exactly what does that mean?
  8. 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?
  9. meles meles

    Burn Rate Chart?

    pdf version attached Relative_Abbrenngeschwindigkeit_Export_Feb._2018.pdf
  10. 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
  11. Scurries away to investigate...
  12. Nuffink wrong with Bren bipods, ooman. Then again, there's a lot wrong with you bipeds...
  13. 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...
  14. Or midnight black, with ΜOΛΩΝ ΛΑΒΕ and an infra red torch for the Walts?
  15. All it needs to be really Tacticool is a quick spray with Flat Dark Earth...
  16. 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.
  17. From what we have read so far, the A-Tec and Schultz and Larsen brands seem well worth considering too. This review seems a good , relatively impartial overview: https://www.rodandrifle.co.nz/supressor-test.html#/PhotoSwipe1540021909854
  18. We'd think it better to consult the Attorney General rather than the Proof Master on matters of law. 😉 We accept your withdrawal from the debate: thank you for your contribution.
  19. Bear with us Bradders and allow us to benefit from your inestimable knowledge: Sequence of events Gun owner takes gun to RFD to have barrel replaced RFD removes barrel RFD cuts barrel in half, longitudinally, thus rendering it incapable of being used or 'bearing pressure' RFD gives a steel trough, for such it now is physically, to a scientist for examination Does the barrel not cease to be a barrel at stage 3 ?
  20. Slotting it along its whole length - in fact cutting in half along its whole length - would be a pre-requisite for a metallurgical section...
  21. meles meles

    sabatti mrr

    The basic concept used by MRR was 'invented' by Armstrong back in the 19th century and served well enough in naval rifles...
  22. If and when these barrels eventually die and are replaced, we'd be interested in having the old ones (suitably rendered unusable) to examine in our metallurgy laboratory...
  23. meles meles

    Pistol shooting abroad

    We'd recommend Dave's cztacticalpursuits most highly ! We've been there several times and think the things that set it apart from other similar enterprises are: Flexibility - your interests are paramount, whether you just want to sit at a bench and shoot a wide range of pistols / carbines and rifles or indulge in some Ninja tacticool training Knowledge - they really do know what they are talking about Variety - on our last visit, Dave provided a choice of 23 handguns, half a dozen carbines, shotguns and half a dozen rifles Friendliness - they really do go the extra mile to make your stay a great one ! Nothing is too much trouble for them. They'll provide airport pickups, help arrange accommodation, recommend restaurants, re-start your camper van when it has a flat battery... Cost - way cheaper than the stag party oriented rivals in Prague ! We plan to go back again.
  24. meles meles

    An Afternoon on the crows.

    Badger ? *frowns*
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