This has happened a few times that I have had the battle log on to see. A HoC is equipped to The Wounded Horse who is also wearing a Hal Familiar. Sometines the Hal will fire in all 6 rounds of ranged (the extra of course from the HoC) but my main minion The Wounded Horse will not get the benefit from the HoC. Here's the battle log.
It's only the last few rounds of ranged, but both Hal and TWH fired in the first 5 rounds, but as you can see only Hal fired in the 6th.
My only thought is that this might have something to do with the fact that my junction is not totally up to 1.0 for the tat's level, however (unless I'm totally confused) Hal should suffer the junction penalty (which he does some times) not TWH.
Thanks