Does Midorima's shooting ability have a name?
Well, in the manga, his skill is also hardly mentioned, and when he does it, he is "shooting" and mostly translated as "Midorima's super long 3-pointer/shooting" or some variation. There wasn't a special name for it. 

The wikia lists it as:


  Talent:High Projectile ThreePerfect Accuracy Unlimited Range


Source: http://kurokonobasuke.wikia.com/wiki/Shintar%C5%8D_Midorima

So I guess there really isn't a "special" name for his move. Just a super long 3 pointer.