Okay so here is an illustration. It has no application in real life because I didn't want to add uncles aunts, nieces, nephews, brothers or sisters into the equation. But, it does show how the % of your original blood increases over 3 very tight generations. Assume that
Dog 1 is the dog you want to replicate. All the dogs from your line are designated with #s. The outcross bitch is Bitch A and her entire line is designated with alpha characters. Outcross 1 is your initial outcross and Line 1 and 2 symbolize the dilution of Bitch A back into your line.
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I bet that's confusing as hell huh?