I have been shooting my recently finished Bobcat .50 conversion. Playing with different thickness in patches, I have seen a big difference in accuracy. My question I guess is what really grips the rifling- the patch or the lead? Reason that I ask is that I have found a place that sells shot that I know is hardened. They list .490 balls along with their buckshot. Was wondering about shooting hardened patched .490 balls. They are a little cheaper and just curious if anyone has tried this.