I've never had any luck with packing it down. Maybe for a four wheel drive, or front wheel drive car....but forget a rear wheel drive vehicle. The first warm day the pack will melt on top, then when the temps drop again at night.....instant glacier. And if your drive is uphill like mine, that's all she wrote.

I had 6 tons of #11 stone hauled in and dumped in a pile two years ago. Around December 1st, I put the plow on the mule, and shovel the bed full of the stone. It provides weight for pushing snow, and if the drive ices over I have traction material to spread in the tracks close at hand. Works well.

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.