Shot the 14 today, wasn't too bad, accuracy @100yds at least equal to what I've been getting with the .310" FMJBTs.  I had to walk them onto the target from off to the right.   Last 6 with no changes of sight adjustment went into a 2.375"W x 1.25H group.  Casenecks were sooty, so the RL19 load wasn't up to the same pressure level and wasn't burning as efficiently as the WW760 load.  Velocity must've been lower too as I had to move the rear sight up a couple notches from all the way down to get the group in the 10 ring whereas I was hitting high with the 760 load.  This bullet isn't showing any instability at higher velocities.  With all the fellows on castboolits saying it topped out around 1800fps for accuracy, I had expected to run into a wall like I found with the Squibb bullet.  I don't care how hard you cast those, go much above 1600fps and forget about accuracy!  I'll go up a grain with the RL19, see if it'll burn a bit cleaner.  I know the alloy will handle a bit more pressure.  The soot was just dirty case lube blowing back over the necks.  Wiped right off with a paper towel.  I have single box of Federal Gold Medal Magnum Match primers, before I go up a grain, I'll see how the burn goes using them with the same charge.  Just a few!