Weighting N Scale Rolling Stock

[rlandry6]

I finally got around to weighing my cars. I'm surprised in the inconsistancy. They run the whole range. I started looking for something to accurately weigh the cars. A spring loaded postal scale just doesn't get it. It increments in 1/2 ounces. I'm a refrigeration guy, so I have a scale that I use to weigh a freon charge and it's accurate to .25 oz. better, but still not the greatest. Plus, it takes up an enormous amount of space on my bench. Then I remembered. Along with all of my other interests, I'm a gun nut. I reload all my calibers. I have a balance scale that I use to check accuracy of my powder dispenser and it's accurate to .1 of a grain. That's grain as in 437.5 grains to an oz.

The specs say an N scale car should weigh .5 oz plus .15 ounces per inch in length. Feel free to check me here, guys, cause I'm not a math wiz. Here's what I came up with. A 2" car should weigh .8 oz or 348 grains. A 3" car would weigh .95 oz or 413 grains.
I preset the scale for what the car should weigh, then I lay the car in the powder cup and with a pair of ***s, start snipping chips of lead off of a 240 gr. lead bullet, that costs me about .04 cents apiece. I add the chips to the cup until the scale balances out at zero, and walla... A correctly weighted car. Then I split the lead chips into two equal piles, lay a pool of white glue over each truck and lay the chips in the glue. I'm thinking that the liquid will evaporate from the glue herefore adding hardly any weight from the glue. Even discounting that, it should be plenty accurate ..