# Thread: Weight of Round Balls according to the diameter?

1. ## Weight of Round Balls according to the diameter?

Is thee a formula for determining the weight of a pure lead round ball by its diameter. It would be easy just to weigh it, but I don’t have one and I want to make a boolit close to the same weight.  Reply With Quote

2. lead round ball weights are and have been pre-determined. where the weight varies either way.......... depends on alloy purity. 54 cal. is 230 gr. (.530 dia.) slightly heavier if it were .535 dia. and so on.  Reply With Quote

3. A lot of Re Loading manuals list ball diameter and their weight cast with Pure Lead.
But your mold may vary a bit as well as your alloy.
But the weights are close enough for what we do.  Reply With Quote

4. Originally Posted by GregLaROCHE Is thee a formula for determining the weight of a pure lead round ball by its diameter. It would be easy just to weigh it, but I don’t have one and I want to make a boolit close to the same weight.
Let me know what diameter ball you need the weight on and I will look it up in my chart  Reply With Quote

5. 45 cal is 127g and 50cal is 175g  Reply With Quote

6. just use this, beartooth bullets has a calculator where you type diameter and it gives weight but it seems broken and wont give answers, doing the math manually dont look fun and i cant find another direct calculator for it

.310 = 45 grains
.315 = 47 grains
.321 = 50 grains
.350 = 65 grains
.360 = 71 grains
.375 = 80 grains
.395 = 92 grains
.400 = 96 grains
.433 = 122 grains
.437 = 127 grains
.440 = 128 grains
.443 = 131 grains
.445 = 133 grains
.451 = 138 grains
.454 = 141 grains
.457 = 144 grains
.490 = 177 grains
.498 = 180 grains
.520 = 212 grains
.530 = 224 grains
.535 = 231 grains
.543 = 241 grains
.550 = 251 grains
.560 = 260 grains
.562 = 276 grains
.570 = 279 grains
.575 = 286 grains
.595 = 317 grains
.600 = 325 grains
.610 = 342 grains
.648 = 410 grains
.662 = 437 grains
.678 = 469 grains
.680 = 473 grains
.690 = 495 grains
.715 = 550 grains
.730 = 586 grains
.735 = 598 grains
.760 = 661 grains
.775 = 700 grains
.835 = 875 grains
.919 = 1167 grains
1.052 = 1750 grains  Reply With Quote

7. 1) Determine the volume of a sphere: Diameter cubed (D x D x D) times .5236.

2) Multiply the above figure by 2,873.5 (the weight of a cubic inch of pure Pb in grains).

3) The resulting figure is the weight of a given diameter pure Pb RB in grains.

AntiqueSledMan.  Reply With Quote

8. You do the math and you get the weight of the ball IN THEORY!!
Unless the ball is swaged there's going to be a void, a true void, in the ball. It will be up near the sprue. Cut one in half and look for yourself.
My grandpa showed me this eons ago. That's one reason why you load sprue up. It's also why people weigh their RB.  Reply With Quote

9. Dixie Gunworks used to have little interesting tid bits in the back of their catalog. I assume they still do. I enjoyed reading them.  Reply With Quote

10. I found this formula several years ago. Diameter^3 x 1504.56 = weight in grains. That's diameter cubed, times 1504.56. That's the same formula as AntiqueSledMan posted.  Reply With Quote

11. ## You can also use Beartooth Bullets calculator, which also allows you to compensate for alloys as well as pure Pb: http://www.beartoothbullets.com/resc.../roundball.htm  Reply With Quote

12. Does beartooth calculators actually work for anyone. I hasnt worked on any device in my house for like a year.  Reply With Quote

13. Beartooth calculator doesn't work for me, tried different combinations, but it comes up empty.  Reply With Quote

14. Doesn't work for me either on this (borrowed) computer. However, it works perfectly on my machine at home.  Reply With Quote

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