A wizard that possesses the feat Arcane Mastery (Complete Arcane 73) employs the special ability share spells so that both the wizard and the wizard's familiar gain the benefits of the 6th-level Sor/Wiz spell eyebite [necro] (PH 228-9).1 The familiar (that does not possess the feat Arcane Mastery) targets with the eyebite spell's effect a foe that possesses spell resistance.
Is it possible to take 10 on the caster level check needed to bypass this foe's spell resistance?
1 Maybe the spell eyebite is invalid for the special ability share spells. In my campaign the spell that was actually shared for several levels was the 4th-level Sor/Wiz spell energy spheres [evoc] (Spell Compendium 80) until I reread the spell and found it was likely ineligible. However, the crux of the question remains Does the familiar benefit from its master's feats (or, at least, the feat Arcane Mastery in particular) when sharing spells? not Can the spell [whatever] be shared using the special ability share spells? Answers are free to use as examples more appropriate spells.