Now for the real stupid question of the day. I realize this is probably like bringing a knife to a gun fight, but golf uses dimples to stabilize the flight of the ball. Any value in doing that in the area between 113 and 115 for stabilization?
There are no stupid questions in aerodynamics. The dimpling of golf balls has to do with preventing "attached flow" in ultra-low-speed aerodynamics. I believe it minimizes hooking and slicing effects while increasing flight durations. It is sudden flow attachment which causes a curve ball to break suddenly and a knuckle ball to jump randomly at a certain airspeed. Low-speed aerodynamics of spherical projectiles is just weird. For that matter, look at the transonic behavior of a 9/16-inch diameter sphere.
As to your question about airflow over the boat-tail surfaces, it is already in turbulent boundary layer flow for my bullet design in any rifle caliber. I want that flow field to remain attached to the conical BT surface in order to direct that flow smoothly toward a compression point 3.2-calibers behind the base of the bullet. I believe that design might promote base pressure recovery by partially entrapping the shed wake vortices and pulling them along with the bullet. That is how an "effective boat-tail" design is supposed to work anyway. The rear corner of the BT is machined sharp for this flow-directing purpose. Any radius there greatly promotes alternate vortex shedding which increases drag and causes flight instability, especially at transonic airspeeds.