Magus- hit with touch spell but not weapon?

[Cylerist]

If I use spell strike and roll high enough to hit the targets touch AC but not it's normal AC do I deliver the touch spell but not the weapon damage?

[Claxon]

No. It's all or nothing.

[Dave Justus]

Nope. If you want to hit against the touch AC, don't use spellstrike, just deliver a touch attack. If you want the weapon and the spell damage, you can use spellstrike but then you must hit regular AC, not touch AC.

[DinosaursOnIce]

What Claxon and Dave Justus said, it is all or nothing.

But the nice thing is that a touch spell doesn't discharge until you actually hit them (or cast another spell).

So you could do the following:
Spellcombat
cast shocking grasp
Deliver shocking grasp with spellstrike
Miss
Take the Attack part of spellcombat and spellstrike again