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Type: Posts; User: grumpy one

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  1. Replies
    72
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    125,626

    Sticky: Lead melts at 327 degrees C, and copper at 1084...

    Lead melts at 327 degrees C, and copper at 1084 degrees C. Alloying the two is therefore not as simple as mixing metals with similar melting points. This is the same issue that arises when alloying...
  2. Replies
    5
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    2,002

    The roofing lead that I am familiar with, is dead...

    The roofing lead that I am familiar with, is dead soft, rather high purity. You can verify that yours is the same by seeing how it behaves if you fold it or hammer it, if you don't have a hardness...
  3. Replies
    11
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    2,060

    The stick-ons I've smelted had around a couple of...

    The stick-ons I've smelted had around a couple of percent of tin, much more than clip-ons have (about 0.5 percent), but virtually no antimony, and they have been quite a bit softer than clip-ons....
  4. Replies
    17
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    5,770

    The stick-ons I've handled have mostly had a tin...

    The stick-ons I've handled have mostly had a tin content of about 1.5%, with very little antimony (about 0.5%). They are considerably softer than clip-ons, but quite noticeably harder than pure lead....
  5. Replies
    13
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    3,839

    I've read on internet sources that stick-ons are...

    I've read on internet sources that stick-ons are usually (not always) about 1.5% tin. This might be to make them stay shiny. The ones I've melted acted as if they were high tin compared with...
  6. Replies
    27
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    3,380

    What is best depends on what you are going to do...

    What is best depends on what you are going to do with the alloy, and the amount of emphasis you place on cost. Good bullets, with a lot of heat treatment potential, can be made from straight WW,...
  7. Replies
    11
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    1,790

    I've never wanted to mix an alloy in the same...

    I've never wanted to mix an alloy in the same melt as I smelted WW, mainly because it always seems there is too much risk of making a mess. The smelting process is focused on getting the melt clean...
  8. The 1980 Lyman Cast Bullet Handbook says that WW...

    The 1980 Lyman Cast Bullet Handbook says that WW are 4% antimony, and that you can make No. 2 Alloy by using 9 lb WW and 1 lb 50/50 solder. Obviously that formula did not really produced No. 2, it...
  9. Thread: rifle alloy

    by grumpy one
    Replies
    29
    Views
    3,922

    When you get above a certain level of antimony,...

    When you get above a certain level of antimony, the hardness increase you get in response to heat treatment decreases. Linotype hardly responds to heat treatment at all. After quite a lot of...
  10. Replies
    8
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    1,473

    A little antimony helps hardness considerably,...

    A little antimony helps hardness considerably, and increases toughness as well, but as others have said, you can get by without it at the pressures you are currently using. The issue is that...
  11. Replies
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    1,637

    You haven't said what your base alloy is. If it...

    You haven't said what your base alloy is. If it is wheelweights, it already contains close to the optimum amount of antimony, but is rather low on tin for bullet casting. It can be used as-is, but...
  12. Thread: linotype

    by grumpy one
    Replies
    8
    Views
    1,758

    Unless you have an exceptionally good barrel,...

    Unless you have an exceptionally good barrel, that sounds like mission impossible. Most people working with a velocity that high would be wanting 25 BHN or higher, and straight linotype is only 22...
  13. Replies
    72
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    125,626

    Sticky: Dannix, my whole process here has been put on...

    Dannix, my whole process here has been put on permanent hold because of problems getting analysis done at a sensible price. A local scrap metal business had agreed to run an XRay Fluorescence scanner...
  14. Replies
    33
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    5,860

    There are two issues here that are possibly...

    There are two issues here that are possibly having separate effects. However they can be solved one at a time. The issues are getting the right alloy hardness, and getting the right bullet fit in the...
  15. Replies
    14
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    2,494

    I think using 5/5 alloy for such a low pressure...

    I think using 5/5 alloy for such a low pressure load is a waste of money, and it is not quite optimum metallurgically (3/3 will give better toughness, the same castability, and slightly lower...
  16. Replies
    5
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    1,666

    I have not experimented below 0.7% tin, 2%...

    I have not experimented below 0.7% tin, 2% antimony. A maximum heat treatment brought that alloy to 23.5 BHN. You can certainly get substantial hardening at 1% antimony; perhaps about 17 BHN with a...
  17. What matters most is what kind of shooting you...

    What matters most is what kind of shooting you will do. Some jobs benefit from one kind of alloy, and some from another kind. At one extreme you might want to muzzle load, and at the other, maximize...
  18. Replies
    14
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    2,107

    A sudden increase like that is cause for concern,...

    A sudden increase like that is cause for concern, because you are doing something wrong. You might consider two possibilities for a start: lead is getting into places other than your casting area;...
  19. Thread: Monotype

    by grumpy one
    Replies
    9
    Views
    5,987

    I suggest you dilute the monotype even more than...

    I suggest you dilute the monotype even more than Echo suggested. You can read something about the issues and the ideal alloy range in the "Toughness of Lead-Tin-Antimony Alloys" thread in Classics...
  20. Replies
    6
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    1,447

    In in a lead-tin-antimony alloy, if you have more...

    In in a lead-tin-antimony alloy, if you have more tin than antimony you may get nasty results - there is an article by Dennis Marshall in the RCBS Cast Bullet Manual explaining the problem. However...
  21. Replies
    10
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    2,006

    You could make the bullet somewhat lighter by...

    You could make the bullet somewhat lighter by adding tin and antimony, but this is likely to make the bullets harder (as cast, air-cooled) which is usually not a good idea unless you need more...
  22. I think of bullet hardness for autoloading cast...

    I think of bullet hardness for autoloading cast bullets in terms of two main issues: how hard does it need to be to make it up the feed ramp without marking the bullet; and how hard does it need to...
  23. Thread: "mica" ?

    by grumpy one
    Replies
    3
    Views
    1,752

    Forum: Boolit Lube !

    The mica that is used for various cast bullet...

    The mica that is used for various cast bullet purposes is 'motor mica', and you can buy it in various ways under that name. I bought a pound of it as a barrel lubricant for shot-cups for shotshells....
  24. Replies
    20
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    13,621

    I may be missing something, but I have not seen...

    I may be missing something, but I have not seen any reference to one of the design issues for your jig. A thread has a lead, so the cutting tool's edge must not have a vertical shape, it has to be...
  25. Replies
    13
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    2,387

    In my limited experience, the only 5 hp milling...

    In my limited experience, the only 5 hp milling machines I have seen are full-sized toolroom machines. The one-ton-plus tilt-head 3-phase knee mills I've seen so far have been 2 hp. Your mill looks...
Results 1 to 25 of 862
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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check