Everyone says that OC has higher oral biovailibility but when I was younger I'd nothing but snort them. The oral route felt inferior. I think they get into your system faster that way, so even though the oral route has higher BA, the rush is better with the former.
Nowadays, though I don't mind it, I no longer prefer the Oxycodone high so I never make it a point to seek them out. Every 3-4 months my doctor gives me a script and I get to enjoy them but I no longer feel the need to insuflate them. The oral route works just fine.