Cast Round Balls

[moon]

I used a TC mould to cast fifty caliber round ball. Question is the load charts state 180 gr round ball---but mine weight out at 140 {app} Whats up?? Thanks

[Old Ironsights]

Assuming you are casting a .490 Round Ball for your 50 and not a .457 You must have a lighter alloy or are casting with voids...

Pure Lead Ball Weight Per Caliber

.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
.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

[JeffinNZ]

I used a TC mould to cast fifty caliber round ball. Question is the load charts state 180 gr round ball---but mine weight out at 140 {app} Whats up?? Thanks

Have you measured them?

Sounds to me like you are casting .45cal or using zinc/tin and not lead.

[moon]

I will measure the ball. Thanks

[dannyabear]

OLD IRONSIDES
Would you happen to have the weights of round balls cast from wheelweights?

[Old Ironsights]

Nope. Sorry. Though someone should have a conversion factor somewhere.

[mooman76]

Sounds to me like the wrong size or an air gap. I don't think the alloy could have that much difference without noticing the alloy is not right before hand.

[mooman76]

Out of curiocity I measured some made from WW's and Lee moulds they averaged

.308 44g
.440 127g
.454 140g
.490 176g
.575 284g.

Also most of these measured a couple thous. over their mould size.

[Rattus58]

Assuming you are casting a .490 Round Ball for your 50 and not a .457 You must have a lighter alloy or are casting with voids...

Pure Lead Ball Weight Per Caliber

.835 = 875 grains
.919 = 1167 grains
1.052 = 1750 grains

Something doesn't feel right about the .919 = 1167 grains and 1.052 = 1750 grains.... :)

Aloha... :cool:

[Maven]

Maybe it would help if I posted the formula for determining the weight (in grains) of a pure Pb round ball*:

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.


*page 224 of Sam Fadala's "Back Powder Loading Manual" (DBI Books, 1982).

[joeb33050]

OLD IRONSIDES
Would you happen to have the weights of round balls cast from wheelweights?

We have an EXCEL workbook in the book called LEAD BALL WORKBOOK.xls that will calculate the weight of any ball of any material of any diameter.
This is available on http://sports.groups.yahoo.com/group/CB-BOOK/, in FILES.
This question prompted me to add the ability to calculate using other alloys.
joe brennan

[Rattus58]

Helped a lot, Thanks... and surprising too when you just look at the numbers.... :D

Aloha... :cool:

[cattleskinner]

I found this today while looking around on the computer too.

http://www.beartoothbullets.com/rescources/calculators/php/roundball.htm

~Amos