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wymberley

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Everything posted by wymberley

  1. Not sure, but could it be the day early - 20/21 - because it's a leap year?
  2. Quick update; boxes still with the RFD awaiting collection by Eley.
  3. The Proof Houses themselves or the BASC is a good bet. The latter some time ago sent me some info after I'd mislaid my references. It is an extract from a well work but unfortunately I'm not certain of the title so won't mention it. This work indicates that where optional metric proof was stamped after 1984 it designated proof rather than service pressure (900 or 1200kg as required by the manufacturing design). After 1989 the proofing units changed to bar and the figures became 850 and 1200 but retained the proof and not service pressure. I would imagine that if you have a cartridge which is safe to fire in a 3 ton service pressure chamber it will not exceed that pressure. The proof pressure for that chamber I would imagine would be somewhere over 5 tons. Also, that cartridge would perform satisfactorily. 850 bar is about 51/2 tons so it would make sense for that to be a proof pressure. Our satisfactorily performing cartridge pulls 3 tons which equates to 460 bar so a figure of 650 would appear to be out of order. Should this actually be required then surley it would be prudent to seek out a chamber proofed at 1200. Be safe, be sure.
  4. Now, this is where you ignore me and get professional advice. As we've already seen, a service pressure of 3 tons would have a proof pressure of some 51/2 equating to the 850kg figure. Now from the UK proof houses, the gun would previously have been stamped 3 tons as we did use the service pressure as an indicator. This has now changed in two ways; firstly we now use proof pressures and the terminology (via kg/cm2) is now bars (one bar is atmospheric pressure - 14.7psi in English). Consequently, I believe that your 850 is proof pressure. I don't have this problem, mine is proofed for 11/8oz - simples! Be safe, be sure.
  5. Hi, again, you weren't there when I started. Hopefully the proofing will now remain in bars for a while. I could well imagine tha your gun was made just prior to the change in proof regulations and had it been made a little later, it would have rated 900 but that's guesswork. For all intents and purposes, you can read kgs for bar - Googling a pressures conversion table reflects little difference. Edit: Service pressure is the maximum working pressure in different terminlogy and basically means the maximum pressure that any cartridge used should generate. Proof pressure is a higher pressure at which the gun is proved to ensure the gun is able to withstand that service pressure and then some.
  6. But only because I know what you mean! Even though we have a contradiction in terminloogy, 850kg equates to 3 tons in the sense that for a serice pressure of 3 tons the proof pressure would have been 850kgs (5.5 tons). All figures ish. 850 is not necessarily low as the gun would have been proved to a figure consistant with the use for which the maker designed and made it for. The problem is that guns tend to last a while and constant changes to the proof system makes life difficult - the biggest change for us was arguably going from having the proof markings annotated on the guns changed from the service pressure to the proof pressure.
  7. Hallelujah! Ignorance is bliss! Edit: Re Salopian, Post #480.
  8. Exactly, it's a minefield. The problem is is that Joe Bloggs has to understand it in order to be safe. As the changes are legion this becomes increasingly difficult and therefore we must be able to rely on the professionals to ensure that we don't come to grief.
  9. Wouldn't that be for 0.729" (standard)? I've always wondered how the English 9" dimension was expressed if the bore was given in metric - 23ish mm?
  10. Surely the 18.5 is the barrel ID in mms. If I were you, I'd do some checking. I will not say more because I don't KNOW whether the 850 is service or proof and the same applies to the cartridges. In other words, if the gun is service and the cartridges refer to proof then the shop chappie could well be right. As it's you pulling the trigger, the onus is on you to know. I'd ignore all comments on here regarding the proof marks and seek professional advice. Be sure, be safe. Edit: Al, you weren't there when I started!
  11. All through this thread, David has meticulously answered every point raised. Now, whether you think rightly or wrongly is academic. There is one (possibly another to prove the rule) exception and it's the one to which these posts refer. It is the one where both David's response and BASC have failed. Education
  12. Didn't want to say that as it's not what you asked; but for sbs/live quarry double triggers are much faster and possibly less confusing. If you don't need ejectors - in reality, most people don't for live quarry and you only have then to pick up the cases - your budget puts you into a very nice English boxlock ballpark should you wish.
  13. Very, very impressive indeed! With a target diameter of not too much more than, say, 1.25 to 1.5" and at that distance, what scope at what mag. were you using to pull that off?
  14. For the solution to the problem it isn't necessary to go back that far. Any legislation is not going to affect us old codgers too much but the younger element will feel it. Now, when I was small and did something stupid I had my 6d pocket money stopped. Why should this just apply because you're small? If you are one of the 'youngsters' and your parents are still alive, ask them how they voted in 1975. 'Yes' was the epitome of crass stupidity and if that is their reply, then confiscate their pension(s) and you should have something towards your next bismuth purchase. Serves 'em right!
  15. Yep, hear what you're saying. I got the (hard)wiring/load protection requirements from the mamufacturer's specification sheet which we'll look into next week.
  16. Yep, thanks, As said my pet sparky (highly qualified electrical contractor) is calling next week to check this out BEFORE I order anything.
  17. Yep, hope so - her indoors has really taken a fancy to this particular one. Problem is is that the isolator is away from the existing cooker so I suspect some changes have been made when the (bungalow) loft conversion was done. The cable twins are black/red and I haven't a clue just how pre 2004 (or 2006, can't remember) the installation is. From the replies, it's looking good so am content to wait until next week to be certain. Thanks, All.
  18. Ade, is that what you think I need or what I have at present? I think that is what I need and am hoping that is what I have - I've just recently put the upstairs floor back down and re-carpetted so it's staying down! Cheers
  19. Phew, that was quick, many thanks. The distance is about 10 metres - this won't change. The new cooker is rated at 7.54 Kw and calls for a 32Amp fuse.
  20. OK, Sparkies, don't panic, I'm not touching anything! I'm looking at uprating my cooker. I know what the power rating for my existing one is, as I do for the one I'm looking at. If the existing cable rating needs to be increased, this could well prove to be more trouble than it's worth. There is no indication at the fuse box to help - all I have is the outside diameter of the individual cores of the existing flat cable. My pet sparky is coming in next week to have a shufti, but meanwhile, I'm just wondering if it's possible to give an idea of the rating from an OD of 5mm? Many thanks.
  21. Is this a case of the blind leading the blind?
  22. To answer the question, in round figures, at 100 you'd drop 1/4" and 120, 1".
  23. They don't, it's a load of old squit. A gun will/can only shoot where, due to his/her technique and physical characteristics, the individual aiming it points it. There is, however, a train of thought that there is an advantage of having the gun fitted to that individual so that is where the pattern centres. If you shoot at the 'feet' of a pheasant for example, the pattern will centre on its body is the principle. There is no sense of scale to the picture but if you 'aimed' at the cross towards the bottom of the pattern, you're looking good - a slight cast problem perhaps to be pedantic. See what happens if you mount and shoot with, perhaps, a rough outline of a pigeon drawn on the 'plate'.
  24. Not only is this situation against the ethos of the Olympic movement, it is also patently ridiculous. It ranks just marginally higher to the failure to ensure that the Ballistic Research Laboratory had a future as an unfortunate occurance in the field of shotgunning in the UK.
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