Most of my brand new packs start out around 1 mΩ and tend to go up to around 3 mΩ within the first 6 months, then hit around 8 mΩ after a year or so, typically around 20 mΩ is when I start to see swelling of the cells and performance/capacity starts to degrade to the point where I only use the packs for practice and I start shopping around for some new packs.