I Read the Article and the one on possible .25 Magnum cartridges.
My Experiments are in a similar vein.
I have a Ruger "Convertible Single Six that was .22 Cal" converted to 8 shot cylinders and Center Fire use.
My FIRST cylinder has been reworked from .22-MAG to .25 ACP so I can develop some baseline data from its 10-5/8" Barrel (made from a Lothar Walther .25 ACP/6.35 Browning Cr-Mo Pistol Barrel Blank with a 1:9.8" Twist and 6 grove Rifling.
I hope to try some bullets heavier than 50 grain in this cartridge as well as "Mildcat" variations in case lengths of 1.055", 1.125", ~1.250" in this and subsequent reworked Cylinders (I now own four of the 8 shot .22-MAG Replacement cylinders).
What is Worrying me is the Unknown BE-86 performance in Small Charges, in the one to Three Grain range, in these small volume (6.7 grains of H2O for the .25ACP) Cases. Since the .25ACP is a semi-rimmed Cartridge, I at least don't need to worry about head space problems with Crimping my bullets. but I do need to 'worry' about the Cylinder "fore and aft' movements upon firing and its effects on 'head Space' and Primer cup 'movement'.
Best Regards,
Chev. William