One of the problems with a reversed long nose is how long it takes the ogive to clear the muzzle with the muzzle blast playing off of it all the way. Any tiny crown asymmetry tends to tip it while that is going on, and that may be part of what you are seeing. The larger overall group is likely to be due to exaggeration of initial yaw by that mechanism.I finally shot the reversed 200 gr. lead rnfp and the same bullet nose first. The reversed bullets made nice, round, even holes. However, they did not seem as accurate as the nose first. In general, they went slightly left of point of aim. I'll put up with ragged edges for the time being.