The new RL19 is bit more energetic than the old.  The primers of the new loads had a little less radius on the edge than the loads with the old powder.  The group was higher and bigger, but still smaller than the black.  There's still no alloy blowing back on the casenecks.   The new RL19 burns cleaner than the old too.  I was seeing a few mummies with the old, none with the new.  There's still some lube blowing back on the casenecks, but I'm not going to worry about it.  It could be the new powder doesn't need the extra fire of the magnum primer to get going.  That's a good thing as I only have what's left of a single box.  The #34s I have a big bunch of thanks to a local gunshop going out business via online auction.  I bid on what they listed as approx 4000, wound up with 6800 at .01ea!