Ok here's the question. The calibers it seems I can not find are 30-30, .308, and 7mm-08. I can find used 30-06 and 223 all day long. I can also find new 30-06 , 223, and 243. Why is this so? are the calibers I'm looking for that popular that they sell out quickly, or do they not make as many of them as the others? Is it perhaps a time of the year thing, or just my usual bad luck? It really doesn't matter just curious.