1. Attention: We have put together a thread with tips and a tutorial video to help with using the new software. Please take a moment to check out the thread here: Trapshooters.com Tutorial & Help Video.
    Dismiss Notice

shot ?

Discussion in 'Uncategorized Threads' started by 101Diamond, Mar 15, 2007.

Thread Status:
Not open for further replies.
  1. 101Diamond

    101Diamond TS Member

    Joined:
    Jan 29, 1998
    Messages:
    166
    OK. 1 1/8 load of shot wieghs 492.2 grains. In several years of reloading I watch my powder drop wieghts religiously but also knew my shot drop was light. Decided to fix this. Opened up the shot bushing to get drops of 482 to 488 grains (this is with West Coast Magmum). Now running Lawrence magnum and wieghts went to 507 to 512 grains in the same bushing. Is this a product of antimony or shot diameter? Also have several bags of Black Diamond and will test them. What's up.
     
  2. Jim101

    Jim101 Active Member

    Joined:
    Jan 29, 1998
    Messages:
    1,942
    Location:
    Knob Noster, Mo
    Mostly variations in antimony.





    Jim
     
  3. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    Mostly variations in shot size.

    Neil
     
  4. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    And now the homework assignment. Is there a way to decide which of the above is mostly right? Or are they about equally likely? Show your work.

    Neil

    For extra credit, is there a way, short of metallurgical analysis, to know almost for sure?
     
  5. hmb

    hmb Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    9,412
    Count the number of pellets in each drop. If the number of pellets is the same then it's the alloy. If I was a betting man I'd say Lawrence has little or no antimony in its shot. HMB
     
  6. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    hmb gets the "A " for the method, but if I were a betting man, I'd bet the other way.

    Neil
     
  7. JBrooks

    JBrooks TS Member

    Joined:
    Nov 6, 2006
    Messages:
    3,707
    The bushing is not a scale. As such it delivers shot by volume not weight. Consequently, the density of the shot is far less material than the size of the shot.
     
  8. Harold

    Harold TS Member

    Joined:
    Jan 29, 1998
    Messages:
    247
    JBrooks,

    I don't follow your logic. Please explain.

    My money is on the antimony.
     
  9. 101Diamond

    101Diamond TS Member

    Joined:
    Jan 29, 1998
    Messages:
    166
    Hellloo, so now I have an illegal load by about 10 pieces of 8 shot. How do I deal with this???
     
  10. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    To save looking it up, antimony has a density of about 6.7 gm/cc and lead about 11 gm/cc. Guessing that West Coast has 6% antimony, is it possible that it's _all_ an antimony difference that accounts for the beast's findings??

    Show your work.

    Neil
     
  11. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    You deal with it by invoking the ATA rule which allows you a 3% overage and boning up on the idea of significant figures. You are home free.

    Neil
     
  12. DUSTER 99

    DUSTER 99 TS Member

    Joined:
    Jan 29, 1998
    Messages:
    28
    I have tuned my reloading bars by honing out the shot hole a little at a time and then droping a few loads though the reloader until I got a pretty consistant weight of 492 grains of #7 1/2mag shot. I did this to three different bars honing each bar for a specific shot size, one for #7 1/2's, one for #8's, and one for #8 1/2's. I made sure that I marked the bars for each shot size, as it made a difference in the drop weight if I used the smaller sizes in the bigger bar. I am now droping my shot load by weight and not by volume and I have noticed that if I go to chilled shot it does make a difference in the weight due to the antimony that is added. Dusty
     
  13. Neil Winston

    Neil Winston Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    7,845
    Harold?

    Neil
     
  14. BRAVO55

    BRAVO55 TS Member

    Joined:
    Jan 29, 1998
    Messages:
    27
    Hello,

    I did something very similar to what you did. I fixed my over sized bushing by adding pieces of masking tape to the inside of the bushing. It takes a little time to get it right because you have to add the tape, reinsert back into the bar, fill the shot tube, drop a few test loads, rinse and repeat...
    Or you could just by a Universal charge bar. I installed one on my 9000G and it works like a charm. Best money I've spent in a long time! If the loads are a little off, it's a piece of cake to adjust up or down.

    hope this helps,
    Randy
     
  15. Harold

    Harold TS Member

    Joined:
    Jan 29, 1998
    Messages:
    247
    Density of 6% antimony shot is 11 grams/cc*.94+6.7 grams/cc*.06 = 10.74 grams per cc which is a difference of 11-10.74 = .26 grams per cc which is .26/11 = .023 or 2.3 percent lighter than pure lead.

    25 grains per bushing difference is about 5 percent of 482, so no it can't be just the antimony. Neil's right.
     
  16. 101Diamond

    101Diamond TS Member

    Joined:
    Jan 29, 1998
    Messages:
    166
    Thank you, Neil. Your the man. Next drop will be Black Diamond, and see how this compares in weight.
     
  17. famill00

    famill00 TS Member

    Joined:
    Oct 16, 2006
    Messages:
    610
    There is a VERY EASY fix to this. Buy the adjustable charge bar. I can hit 492 +/- 5 grains every time.


    Forrest
     
  18. oleolliedawg

    oleolliedawg Banned User Banned TS Supporters

    Joined:
    Jan 29, 1998
    Messages:
    10,124
    Location:
    Northampton PA
    Darn, so that's why my last bag of Lawrence 7 1/2's only dropped 470 grs. They musta've sold me #7's!!
     
  19. 101Diamond

    101Diamond TS Member

    Joined:
    Jan 29, 1998
    Messages:
    166
    Just loaded several shells with Black Diamond magnum shot. Drops weighed from 492-498 grains putting it between West Coast and Lawrence shot in drop weight.
     
  20. Bob_K

    Bob_K Well-Known Member

    Joined:
    Jan 29, 1998
    Messages:
    1,478
    Location:
    Afton, Virginia
    Pour the shot of each type in a graduated beaker half filled with water. Measure the displacement of the water. The one with the lowest displacement will be closer to pure lead; the one with the highest displacement will have more antimony. In this test, the size of the shot is irrelevant.
     
Similar Threads
  1. start1
    Replies:
    1
    Views:
    400
  2. Capt. Morgan
    Replies:
    1
    Views:
    979
  3. capvan
    Replies:
    17
    Views:
    2,880
  4. #1ROCK
    Replies:
    0
    Views:
    1,019
  5. Rich219
    Replies:
    0
    Views:
    1,159
Loading...
Thread Status:
Not open for further replies.