On paper, 160mg oxycodone P.O. is stronger than 130mg morphine P.O.
However, you never know if your body is more sensitive to one drug than another - and oxycodone is known to be better-tolerated than morphine at equianalgesic doses due to decreased side effects (most prominently respiratory depression and sedation). Add in incomplete cross tolerance, and you may find they aren't so out of proportion.
I certainly wouldn't take 240mg of morphine (which is what most charts equate to 160mg oxycodone) - try the 130mg you were prescribed, and work up from there.
This is all to be careful, since mistakes with strong opioids can become fatal very easily. With its low oral BA, some 40-50mg of morphine will enter systemic circulation, compared to over 100mg of oxycodone. But really, start small, and be careful. Being overconfident with potent full opioid agonists is the stuff obituaries are made of.