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estimation of pogo pin resistance

Is there a scientific way to estimate the resistance of a pogo pin? 

![Image_alt_text](https://electrical.codidact.com/uploads/sacx2gecr3m7kri6wautq54g5h69)

If it was a solid cylinder or wire one could calculate the resistance:
R = ρ × L / A

But a pogo pin is hollow inside, the spring might be from a different material, etc.