Yea, I cook it to right at 140 then wrap with foil and stick back on the smoker till around 155-160. I bone out the hams and smoke the individual muscles. Let it get any hotter than that and it will dry it to jerky state, for me at least.
Try this next time and let me know how you like it:
Slice backstrap about 1" thick
Soak in straight Tabasco(at least one whole bottle) and fresh squeezed lemon juice overnight(nothin else)
Wrap bacon and stick with toothpicks
Smoke them at 225 or so until done (only takes a couple hours)
Would think that it would be hot but it isnt. I love to do any wild game like this, especially birds (dove and duck)! Good stuff, I guarontee!