double t? 12:52 Jul 24, 2010
Here's what Oxford has to say on the subject, which suggests conclusively that while 'getting' does take a double t, 'targeting' doesn't:
Doubling of final consonant
1. When certain suffixes beginning with a vowel are added to nouns, adjectives, adverbs, and verbs, the final consonant of the stem word is doubled before the suffix:
(a) if the preceding vowel is written with a single letter (or single letter preceded by qu) and
(b) if that vowel bears the main stress (hence all monosyllables are included).
So bed, bedding but head, heading; occur, occurred but offer, offered; befit, befitted but benefit, benefited.
Suffixes which cause this doubling include:
(a) The verb inflexions -ed, -ing, e.g.
begged, begging
equipped, equipping
revved, revving
trek, trekking
(b) The adjective and adverb suffixes -er, -est, e.g. sadder, saddest.
... | 
peer agreement (net): +2
