The club that I shoot at had some of their lead reclaimed last year and the barrels were weighed. I dont think that any of the barrels had more than 3000 lbs in them, most were around 2800 lbs and were full to the top. The shot that was in the barrels was very clean.
There is big differeance in volume between 7 1/2 and 9 shot. Doesn't it make sense that there will be more air in the bucket of 7 1/2 shot. Therefore it would weight less than the more dense bucker of 9 shot?
Sometimes my thinking gets in the way of logic but it sounds right?
Jim, IIRC a relatively large container will hold an identical volume of uniform sized spheres. In other words a 55 gal drum of #2 will weigh exactly what a 55 gal drum of #9 weighs. obviously if the size of the spheres varies much all bets are off- and if the spheres are large relative to the space- like buckshot vs 9's in a .410 shell all bets are off.
basically says the packing density of uniform spheres is 0.7405.
So in theory a 55 gallon container has 55 gal * 0.133680556 cf/gal * 709.7 lbs/cf * .7405 = 3,854 lbs of uniform spheres of pure lead. This will be less than that if the lead has antimony in it- I can't remember the density of 3% or 5% antimony lead.
john - Your packing density calculations are good but it overestimates the weight of the pure lead. Packing density calculations are only valid if there are no edges to the container and that is of course impossible.
Also, others might be surprised that the size of the spheres is immaterial to packing density if the edge effect is ignored. A few big spaces between the spheres is equal to a lot of little spaces. A packing density of 0.74 means that 26% of the area is empty space irregardless of the size of the spheres.
Please disregard my careless use of the obvious double negative "irregardless",but MrkSLC, it is in my dictionary as a substandard word.
hmb- I went to my refrigerator but could not find a carton of milk. I think we used to have some a long time ago. Do people actually drink that stuff?
I do remember that 25 pounds of shot will fill a 2 L jug, but because of the edge effect, a 2 L area in the middle of a 55 gal drum will hold more shot than a 2 liter jug. If you fill a 10 cubic inch container completely full of shot, that volume of shot will not fit into 10 one cubic inch containers.
hairy - Please read the above posts about packing theory. The amount of water that could be poured into the two barrels would be identical, or a long accepted mathematical model and my solid geometry teacher are both incorrect.
Compare barrels of marbles and #9 shot. Then think of bowling balls and #9 shot. Should be more water in the barrel of bowling balls. My vote for the heaviest barrel would be the #9 shot one over the #7.5
My reply is not based on common sense, it is based on basic math. A 55 gallon drum filled with bowling balls, excluding the finger holes will have a few big empty spaces, the same drum filled with shot will have a lot of little spaces. The total volume of the empty spaces filled with either is the same (26% empty space). This of course does exclude the edge affect. A quick study of the mathematical packing theory will support my position.