Jump to content
UKV - The Place for Precision Rifle Enthusiasts

meles meles

Members
  • Content count

    292
  • Joined

  • Last visited

About meles meles

  • Rank
    Advanced Member

Profile Information

  • Gender
    Male

Recent Profile Visitors

938 profile views
  1. meles meles

    .22 tracer rounds

    Looks like fun to us !
  2. meles meles

    DTA SRS rifle

    What make and length .338 barrel did you settle on ?
  3. Indeedy: we've been there a couple of times and endorse all that's been said above. David provides an excellent service at great prices, and can be very flexible to meet different requirements. If you're thinking of trying pistol shooting or carbines, don't hesitate to give him a call and see what package he can tailor to suit your desires !
  4. We've just returned from a foray to Eskdalemuir and thought we'd give you the benefit of our opinion on the trip and the range. We drove up the previous evening from God's Own County and stayed overnight in Langolm. The Eskdale Hotel provides excellent accommodation, food and beer at very good prices. They don't bat an eyelid when they see bags of sporting equipment being unloaded and secured in their rooms either. In fact they'll happily hold the door open for you as you try and manoeuvre long items through the hallway, past the library and up the staircase. (There is no lift) The range itself is about a half hour drive from the hotel through some very scenic countryside. We understand that not everyone sees naked girls frolicking in the river en route but it is worth keeping your eye out for just in case. The range is up a bumpy track so those of you with low slung sportscars on inch thin tyres might struggle a little over the last thousand yards but you could consider that to be getting you acclimatised to what is to follow. Marc and the range staff are very welcoming, explaining the rules very clearly and providing an excellent RCO / spotting service for shooters. At the firing complex there is a very comfy room to relax in complete with kettle and comfy chairs. That, and the log burner, might be very much appreciated for those of you bald monkeys venturing there without fur coats in winter. Beyond this is the covered firing point replete with sturdy wooden benches. Out front of that is a level area where, weather permitting, the aforesaid sturdy wooden benches can be positioned for those who like to shoot from a table, or mats deployed for those who prefer prone firing. Beginning at 100m and stretching out to 1,000 m are steel gongs at 100m intervals. Beyond that are targets at a mile and then at a few intervals out to 2,000m and then a few more out almost to the horizon. We may recall incorrectly, but we think Marc said the current farthest target is just over 3,000 m. We shot from around 10:00 until almost 17:00 in some glorious weather - apparently that was a special order for us and not guaranteed to all. Advice and suggestions were very forthcoming as we struggled at times with judging the wind tumbling down the neighbouring valleys and having a good scrap with itself right where the 1 mile target is positioned. Did we say Marc is a proper tricksy ooman who likes to set a good challenge ? In summary, an excellent range, a mix of easy and challenging targets, awesome potential and very friendly hosts !
  5. Could you do some for square bullets, like the Pope authorised for shooting at heathens ?
  6. meles meles

    What are the ESSENTIALS YOU REQUIRE WHILE CAMPING?

    More beer
  7. meles meles

    Couldn't resist.

    How many pennies, dare we ask ?
  8. meles meles

    FCSA Update

    Sadly, ooman, we think that if he isn't your local MP he isn't allowed to take action on your behalf. You'd have to write to your own MP, and ask him to bring it to the attention of the aforesaid MP. MPs can't ignore a letter from a constituent that specifically asks them to act but they can ignore general whines. Parliament has some funny rules...
  9. meles meles

    Wanted old steel cased 7.62x39

    We have lots, 7.62x39 and 7.62x54R. We'd estimate several hundred and increasing often...
  10. Big Al, (and others) Re your comment " Think about this logically, how would you test for the maker of the most accurate barrels in a way that was scientifically acceptable and thoroughly conclusive?", do you have a suggestion ? We ask because we're thinking of setting such an assignment as a Master's project in metallurgy and have started drafting the outline of the hypothesis we'll challenge students to test. All constructive input would be welcomed.
  11. Actually, it doesn't. Wiki tells you a lot about the applications it is used for, making wondrous claims for the process, but doesn't correctly explain how it works - or frequently doesn't work. Apply critical minds, oomans, to aught you read on t'interweb. (That includes our spiel too. You don't have to believe us.)
  12. Cryo is a heat treatment, it simply means that you lower the temperature rather than raise it. Phase changes will occur, metallurgical transformations and volume changes will still ensue.
  13. To an extent, yes. To fully relieve the stresses the barrels would have to be annealed and that's not something you want to do to gun barrels. Makes them a little soft... A conventional stress relief takes place at a much lower temperature and for a shorter time. It will remove most of the stresses in the barrels and again, that might not be a great thing. They could end up less than straight depending upon how they were made in the first place and then subsequently machined... Please bear in mind though that most of what we are talking about in this thread only matters if you are a superb shot and really can get the best from your equipment. Most of us can't. Any decent factory made gun, let alone one from the several truly great gunsmiths that frequent these pages, will be more than adequate for mere mortals. If the likes of baldie or bradders were to offer us a fluted gun with a button rifled barrel, free, gratis and for nowt, we'd snatch their paws off !
  14. Yes, plenty of good scientific evidence, some of it even in the public domain. Consider the L30 CHARM rifle on a Challenger tank. It's a big, heavy barrel that needs to be stabilised so it can fire accurately on the move. That requires the barrel to be have the least weight possible such that the servos and actuators in the stabilisation system have a chance of keeping it on target. An ideal candidate if ever there was one for fluting. Unfortunately, when a fluted barrel was trialled it had very poor accuracy. The machining of the flutes in a barrel changes the stress pattern within it, and those stresses will be changed asymmetrically too. Thus, as the barrel warms and cools (and that can be due to having the sun on one side and the other in shadow, never mind the effects of firing a round !), it will bend slightly. That is why the Challenger tank has an unfluted barrel, with a thermal sleeve over it to maintain as even a temperature as possible, and a muzzle reference system that uses a laser to measure the amount of bend in any case and let the gunner know where the muzzle is really pointing. Moving down in scale, a trial was conducted on small arms. You know, just to see if "the barrel knows it is under stress" 😏 A laser mounted (rigidly) to the receiver of a rifle and a second to the barrel, equally rigidly. Both collimated to converge at the same spot. Place aforesaid rifle in sunlight for an hour. Both laser dots now no longer concentric. The sun heats up the side of the barrel exposed to it and so that side of the barrel expands by a small amount. However, the 'warm' side of the barrel is constrained by the 'cold' side of the barrel and that doesn't expand as much. The barrel therefore curves a little. It's no longer pointing to the same place it did when it was zeroed. Repeat the experiment with a fluted barrel. The effect was greater. Those trials data were made available to the manufacturer of a premium grade sniper rifle. That manufacturer no longer offers fluted barrels. For most shooters, the above is irrelevant. Your rifle barrel will be capable of shooting with greater accuracy than you can utilise. Bradders summed it up quite eloquently: "a good shooter will always shoot better with a mediocre barrel than a mediocre shooter will do with a good barrel......and there's a lot of mediocre shooters out there..but there aren't that many mediocre barrels."
  15. Machining isn't stress free, ooman. Cutting a groove will produce different stresses than those made by a button. Which is the better process depends upon many things and there isn't s specific right or wrong answer. Most would assert that cut rifling is the pinnacle of rifling technologies but .... Consider the button process for a moment. An oversize carbide button is pulled through an slightly undersize bore, forcing it to take up a new shape. That will certainly leave stresses in the barrel. However, those stresses will be putting the surface of the bore into compression which can be quite a nice situation to be in when you then pressurise the barrel to, say, 55,00 psi. Before any crack can open up and try to blow the barrel apart it has to overcome that residual compressive stress... In addition, the action of the button as it passes through the bore will have tendency to deform each individual grain of steel in the vicinity of each grain boundary and partially close up exposed grain boundaries. That gives a smaller surface area of grain boundaries for those supersonic, 2,000 degree plus, erosive / corrosive propellant gases to work on. In practical terms, a well made barrel from a recognised maker will almost always be capable of better performance than the user, irrespective of the rifling technique. If money were no object, and we were a good enough shot to justify the cost, we'd have our barrels made from a PH grade stainless steel by cold flow forming and then clean them once in a blue moon.
×

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy