Ok so spirited charge gives lances x3 damage when you charge with them. As a magus if you use your spell strike ability to hit with shocking grasp on a charge will the damage from shocking grasp get the x3 damage as well? The reason I'm asking because I know the shocking grasp damage is multiplied on a critical hit.
This is a rules question, but eh, whatever. No, Spellstrike specifically calls it out that no matter what the weapon's critical is, the spell is always x2.
Oh sorry. So spirited charge would make the spell do x2 damage then?
Multiplying Damage: Sometimes you multiply damage by some factor, such as on a critical hit. Roll the damage (with all modifiers) multiple times and total the results.
Note: When you multiply damage more than once, each multiplier works off the original, unmultiplied damage. So if you are asked to double the damage twice, the end result is three times the normal damage.
Exception: Extra damage dice over and above a weapon's normal damage are never multiplied.
Ok thanks for clearing that up! I was just confused because shocking grasp is multiplied on a critical.
No, just the weapon damage. Rider damage isn't multiplied.
Multiplying Damage: Sometimes you multiply damage by some factor, such as on a critical hit. Roll the damage (with all modifiers) multiple times and total the results.
Note: When you multiply damage more than once, each multiplier works off the original, unmultiplied damage. So if you are asked to double the damage twice, the end result is three times the normal damage.
Exception: Extra damage dice over and above a weapon's normal damage are never multiplied.
Spellstrike lets you deliver a touch spell with your weapon, but the spell isn't a modification of the weapon damage. The spell damage and the weapon damage are two different things. The spell damage would be x2 on a critical hit like always.
Spellstrike (Su): At 2nd level, whenever a magus casts a spell with a range of “touch” from the magus spell list, he can deliver the spell through any weapon he is wielding as part of a melee attack. Instead of the free melee touch attack normally allowed to deliver the spell, a magus can make one free melee attack with his weapon (at his highest base attack bonus) as part of casting this spell. If successful, this melee attack deals its normal damage as well as the effects of the spell. If the magus makes this attack in concert with spell combat, this melee attack takes all the penalties accrued by spell combat melee attacks. This attack uses the weapon's critical range (20, 19–20, or 18–20 and modified by the keen weapon property or similar effects), but the spell effect only deals ×2 damage on a successful critical hit, while the weapon damage uses its own critical modifier.
For the case at hand, on a critical hit the lance would deal x3 and the Shocking Grasp spell would deal x2.
^this is correct.
Just to note: OP was asking about Spirited Charge, not critical hits. So what you should be looking at is this...
Spirited Charge (Combat)
Your mounted charge attacks deal a tremendous amount of damage.Prerequisites: Ride 1 rank, Mounted Combat, Ride-By Attack.
Benefit: When mounted and using the charge action, you deal double damage with a melee weapon (or triple damage with a lance).
Just to note: OP was asking about Spirited Charge, not critical hits. So what you should be looking at is this...
Spirited Charge (Combat)
Your mounted charge attacks deal a tremendous amount of damage.Prerequisites: Ride 1 rank, Mounted Combat, Ride-By Attack.
Benefit: When mounted and using the charge action, you deal double damage with a melee weapon (or triple damage with a lance).
I find the OP a bit unclear, but to me it seemed that the question was about the spell damage, not the weapon damage. And the spell damage would follow the standard rules for Spellstrike: x2 for a Critical Hit and x1 otherwise.
Multiplying Damage: Sometimes you multiply damage by some factor, such as on a critical hit. Roll the damage (with all modifiers) multiple times and total the results.
Note: When you multiply damage more than once, each multiplier works off the original, unmultiplied damage. So if you are asked to double the damage twice, the end result is three times the normal damage.
Exception: Extra damage dice over and above a weapon's normal damage are never multiplied.
Not relevant to spellstrike.
Spells are not extra damage, they are resolved as their own damage source.
Spellstrike delivers the spell via weapon instead of touch, and caps the multiplier at x2. Other than the explicitly defined differences, everything is resolved as for delivering touch spells using standard mechanics.