A MILDURA grandmother will spend at least 10 months behind bars after the "drug mule" was found with a commercial quantity of methamphetamine.

Naomi Bullock was caught in a hire car with co-accused Jaron Pavis last August, police believing they had just travelled outside Mildura to collect drugs and money.

Bullock pleaded guilty to trafficking a commercial quantity of methamphetamine, committing...