Is your design based on the discussion from this thread?
https://ogrforum.ogaugerr.com/...56#71397234049191256
In that thread I ball-parked about 80 feet of #28 Magnet Wire - and about 600 turns on a bobbin with a steel core/rod. Did you happen to count your number of turns? Or, as tediously detailed, you can do-the-math to back out what you have by measuring coil dimensions, inside/outside diameters, electrical resistance, Amp-Turn product, and so on.
As for the melting, note that an uncoupling coil dissipates some 30 Watts of power when active! There are soldering irons that dissipate less power than that! 
