I've experimented with Hi-Tek lately for some pistol boolits, but am still using Felix Lube on my rifle boolits, so far.
Felix Lube is generally soft and will get messy if you dump a bunch of boolits together, but I've heard of others putting some wax in it to firm it up. I have never had leading from any full snort magnum pistol or rifle rounds using Felix, and they are accurate.
I think it's better to have a soft lube that will come off the boolit when it leaves the barrel. I've seen pics of boolits that were recovered that had some hard lube still in the grooves. Seems to me that a boolit with some lube left here and there would have a hard time going in a straight line.