Is there any reason by the RAW why half-a-dozen archers qualifying as a trained group should not get the trained-group bonus when shooting their arrows at a target? Someone new to our gaming group suggested that allowing trained-group bonuses to ranged attacks was a house rule, but it seems RAW to me.
Not that I am aware of. Although I could be wrong… I certainly have no memory of wanting to exclude ranged attacks.
Conceptually, instead of a group of competent archers all shooting arrows at you in their own time, you've got a group using volley fire (ish), shooting low when you're busy blocking high against another arrow etc. So it doesn't offend my ideas of realism for training to give a bonus.
It seems to me that a number of steppe peoples used this too great effect against folk like the Romans. Whether with javelins or bows all would fire at a single target to destroy its equipment, then the man himself, creating a breach in an otherwise impregnable wall. Can't have been any fun for the lucky recipient, and no respite either, so no opportunity to fall back to be replaced as the recipient of so much joy. Sounds very like co-ordination by a trained group.