A hint, the reel counters like they use on the wire cutting machines at HD and the wholesalers are not good for measuring while pulling runs.

The pincher system bounces too easily and therefore, begins to skip in the measuring process, if you pull the wire too quickly. Worst part is that it does it more with the larger guages of wire. Which is when you need the accuracy.

The most econimcal system that I have heard of is Sixer's system. Weight before you start, and weight again when you're done and you will know the difference, multi-ply by the factor for that size of wire and you know your length. Its an inexpensive solution.