Domestic house, ring final circuit on an rcbo, end to end tests: r1 = 0.95 ohms, rn = 0.98 ohms, r2 = 1.02 ohms.
It's rare a reading is too suspiciously good!
Sane R1+R2 of around 0.52 for most of house except kitchen area where readings increase wildly suggesting several spurs off spurs so...