Having acquired my first shotgun in more than a generation, I am interested in either buying ammunition, or handloading solid projectiles into roll crimped or star crimped 12 gauge 2.75-inch cases. While I refer to this ammunition as "Paradox," that's a mislabeling. Paradox ammunition had its projectile-loaded all-brass cases much longer than a conventional 12 gauge 2.75-inch roll- or star-crimped cartridge. I refer to bulleted 12 gauge 2.75-inch overall length cartridges. I am specifically ruling out any version that uses a sabot with reduced diameter projectile. I am ruling out conventional 12 gauge projectiles with its extreme hollow base. I am interested only in projectiles that are in the .715-inch through .735-inch range - about 12 gauge's bore size, more or less.
A - What commercial manufacturer offers such 2.75-inch ammunition?
B - Has any of you created handloaded ammunition similar to what I seek? If you have, please describe it in detail.
C - Has any of the cartridges identified or described in "A" or "B" been fired in fully rifled barrels rather than the 2-3 inches of rifling of a Paradox barrel?