I do this all the time and yes if one angles the hole a little bit
you won't have to worry about a bar branch. I also thread graft
branches onto my main branches... But, let me state the obvious,
which is often forgotten when doing it, on a branch drill the holes
horizontal, so you don't have a new branch going down... Unless
of course this is the intention...
One more thing, be careful of the whip you use, that it doesn't
have much taper or one of your new branches will end up looking
pretty funny as it goes away from the trunk it gets bigger...