The PT&G 450 Alaskan reamer would chamber for another variation of the cartridge:
The PT&G 450/348 Ackley Improved:
Yep, using the cylindrical .50 brass long enough to make the 2.255" brass length and the 0.502" neck is appealing, with possible benefit of less bolt thrust and longer case life.
Ron aka "Rip" for Riflecrank Internationale Permanente NRA Life Benefactor and Beneficiary .458 Winchester Magnum, Magnanimous in Victory THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.