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Thread: percentage of tin

  1. #1
    Boolit Master
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    percentage of tin

    ????? if my boolit mold drops at 230gr with normal lead mixture
    if a cast boolits with solder what will the boolits weigh with
    70/30 60/40 50/50 ??

    did this with a 255 gr mold and they weighed 217 gr from babbit
    what would that % be ??

    thanx turtlezx

  2. #2
    Boolit Master
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    Doesn't babbit have other metal besides tin in it?

  3. #3
    Boolit Master
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    tin and lead not sure on other metals

  4. #4
    Boolit Grand Master
    bangerjim's Avatar
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    There at least 15 types of “babbit” metal! All are different. Each may/will give different weights.

    Just cast away and do not worry about the weights if you want to use an “unknown” alloy. Or stick to the standard mixes we use and what the mold was ACTUALLY cut for.

    As far as those different ratios you list........try casting ‘em and see what they weigh. I have not seen any reference material that details data like that.

  5. #5
    Boolit Grand Master fredj338's Avatar
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    I have never added more tin than 20-1 lead-tin mix for LHP. I almost never add tin to my range scrap when casting for plinking bullets to 1200fps or so. Yes adding tin will make the bullet lighter, but the 1-2% that most add for good bullet fil-out, it is only dropping wt a very small amount. maybe 1-2% lighter?
    EVERY GOOD SHOOTER NEEDS TO BE A HANDLOADER.
    NRA Cert. Inst. Met. Reloading & Basic Pistol

  6. #6
    Banned
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    Banger is right, go to rotometals site (add at top of the forum) and look at Babbit.
    In short, the higher the lead content, the heavier the bullet.
    http://www.lasc.us/ has a section that explains differing sizes and weight from different alloys.

  7. #7
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    JonB_in_Glencoe's Avatar
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    I can't answer your question on what weight a boolit will be with different solders.
    BUT, if you have a Sn/Pb alloy of unknown percentages and have a good thermometer, you can guesstimate the alloy by finding the melt/freeze temps. Wikipedia:solder has a list of numerous alloys and their melt temp.
    ~~~~~~~~~~~~~~
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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