30 to 1 cast, what should be max velocity.....
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  1. #1
    Marlin Marksman
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    30 to 1 cast, what should be max velocity.....

    What should be the max velocity in order to keep from slumping 30/1 lead/tin mix. I have some loaded now at about 1600fps.

    Do you think that is too fast for the 30/1 or not. The targets do not show tumbling, as near as I can tell (out to 100yd).

    Bullet performance at 40 yd is outstanding (bang/flop, no hop) on a hog. (sorry no hog pic) VTDW will post the pics of the bullet.

    Most all of my hunting shots will be < 100yds. However now with the logging that has been done on our place the longer shot
    may present itself also.

    I am after a general concensus. Any opinions?

    SS
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    L.D. the SwampSniper

  2. #2
    Wrangler
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    Re: 30 to 1 cast, what should be max velocity.....

    If your load meets your accuracy expectations, then don't worry about it. Even a small amount of leading wouldn't bother me if'in accuracy doesn't go to pot after just a couple shots. Try some targets at longer range as well as some penetration/expansion tests.

    Don't fret too much on published hardness values versus pressure. Way too much is made of it. Your bbl condition and boolit fit to the case, throat, and groove are not taken into consideration. Anytime I work up a load for a new boolit, I cast some air cooled, and some water dropped or OHT'd. The same loads are tried with both hardnesses. Often the results will pleasantly surprise you.

  3. #3
    Tinhorn
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    Re: 30 to 1 cast, what should be max velocity.....

    1:30 tin/lead is about 8 BHN. A good working approximation is 3(BHN)x480 = psi working pressure

    So 3(x480 = 11,500 psi

    With powders typically used for blackpowder cartridge rifles you will max out at about 1300 f.p.s.

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  5. #4
    Marlin Marksman
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    Re: 30 to 1 cast, what should be max velocity.....

    Accuracy is not what it could be, but is minute of deer. If 1300fps is max for that lead then I need to back off and see what
    I get. I was worried about the bullet slumping in the bore and thus the less than preferred grouping on target. Looks as though
    that may be the case. The targets did have round holes.

    That load expanded in the hog from .459 to .956 which is a little over 15/16" (15/16 = .937). That's over 2x diameter.
    I expected the hog to run, but that didn't happen. Just keeled over.

    SS
    In God We Trust
    L.D. the SwampSniper

  6. #5
    Really Short Fuse Administrator
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    Re: 30 to 1 cast, what should be max velocity.....

    "That load expanded in the hog from .459 to .956 which is a little over 15/16" (15/16 = .937). That's over 2x diameter.
    I expected the hog to run, but that didn't happen. Just keeled over."


    Wouldn't you as well?
    http://smg.photobucket.com/albums/v354/vtdw1/
    MO Member #77

  7. #6
    Marlin Marksman
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    Re: 30 to 1 cast, what should be max velocity.....

    I'm afraid that it wouldn't take that much for me.

    A wind bruise would knock me over.

    That load may be o.k. as is. More testing is in order to determine if it is good at this velocity. With that performance, I
    sure hope it isn't slumping. I lika de results.

    SS
    In God We Trust
    L.D. the SwampSniper

  8. #7
    Wrangler
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    Re: 30 to 1 cast, what should be max velocity.....

    Try mixing 50% clip-on wheel weights and 50% pure lead. Water drop them or OHT them at 425 F for a hour. It will run around 18-22 bhn depending on your WW's. Air cooled boolits will be around 9-10 bhn. Even hardened, this alloy will expand some and still hold together. The brittleness is reduced over staright WW's or a lino-WW mix. Great hunting alloy that I've driven to over 2,400 fps.

  9. #8
    Marlin Marksman
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    Re: 30 to 1 cast, what should be max velocity.....

    Hey I finally got the pic thing worked out.

    Here is a pic of the 30 to 1 45-70 bullet I used on the hog. Looking back on some of my reloading manuals the velocity
    was probably between 1500 and 1600. I'll find out this coming week as I will take my chrono with me to Mississippi for the
    season opener.

    The second pic is 2 of the hogs we killed at Texas Wild.

    o.k. I had to edit, I don't have it completely figured out yet.



    In God We Trust
    L.D. the SwampSniper

  10. #9
    Marlin Marksman
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    Re: 30 to 1 cast, what should be max velocity.....

    Alright, I will get better with the pics. But at least I got 'em where you can see 'em.

    SS
    In God We Trust
    L.D. the SwampSniper

  11. #10
    bull3540
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    Re: 30 to 1 cast, what should be max velocity.....

    Here a pic of that hog killin' bullet;


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