I have my powder No.7 testing on hold for a couple of weeks as my wife's and my attention is diverted elsewhere for a bit. But, here are some thoughts.
1. Focus is on duplicating results of 1944 paper - and doing so repeatedly before "Modifying" formulas.
2. "Cool Burning" was one of the objectives and notations found in the writings of the 1944 paper. Adding aluminum powder to the mix is going to dramatically raise the Temps. Use of Aluminum in Primers is common, it allows increased temperatures - Plus it provides hot particles ejected from the primer into the powder, providing increased ignition burn rates which s why it is found in "Magnum Primers" used in Commercial Primers for slower burning smokeless powders. Not sure I want all of those "Hot Particles" in my powder mix which ejected into the throat and barrel of the rifle which may cause erosion or burn the steel.
3. Many (myself included) have had success with Duplex loads for igniting slow powders. I still have a thread somewhere on this site where I duplex loaded W860/870/872 powders intended for 50BMG in .223's. I had success with velocities 200 to 400 FPS slower than optimum powders, but good accuracy and performance albeit at slower speeds. For me; using a Duplex load, or mixing nitrocellulose derived from single/double based smokeless powders fails to meet the objective. My concerns of long term dramatically escalating powder prices and "None on the Shelf" started me down this path. A home made product that works effectively; not a modified commercial product was the goal. For a while; I will be staying with the No.7 type powder formulations for now.
4. Although repetitive experimentation may prove differently; the mesh appears initially to be a critical element. I screened the "Failed Powder" Test #2 using a 20 Mesh screen which my test indicated had indications of inconstant ignition with one round fail to fire and 4 rounds tested with heavy vertical stringing on the Target. . Perotters use of a 32 mesh screen results in even finer powder and my thoughts are that would result in even more difficulties.
I appreciate all the thoughts, recommendations, and observation of similar efforts by others. I have prepped 5 rounds of the wet down/dried/and ground to pass large screen powder from as described in Post #57. Will shoot those five test rounds next time at the range.