Assuming you're somewhere in North-America, why use pseudo-MAPP gas?
Real/genuine MAPP gas no longer exists.
There's not much difference between pseudo-MAPP and propane in terms of performance—it burns only slightly hotter in air.
And MAPP is much more expensive!
Edited to add:
Flame temperature in air....
Propane 3,600 degrees
MAP/Pro 3,730 degrees