Reputable generic rounds can be bought for $0.70 over spot (per oz), so I personally wouldn't pay more than that for shots. We can't verify dimensions and authenticity as easily as rounds.
Yeah that's the problem with shot. Is the shot all loose or is some still in the original bag from the producer?
OP said 1k oz coming in, so these are bought in bulk. He also said they're sold in wide range of weights for very small or large btc purchases. I'm pretty sure this implies that he's dividing them up himself and weighing them, so no original bag.