Pellet scales at the chrono would eliminate any doubt about what pellet is being used.
I don't think using a standard pellet would work. My AA-MPR delivers 0.5 ft-lb more with AA-Field 4.51 vs 4.52. My .22 HW95 and HW97 delivers 0.3 ft-lb more using accupels of all pellets! And as others have mentioned, there is the barrel cleaning issue.