Most current consistent model 12 user' s are accustomed to the firing line procedures and for the most part remind the TO that they are shooting a M12. This process took a long time to instill in shooters, TO's and spotters. Heck we are still working on it. It's the main reason I shoot a 97', so I don't have one more thing to think about.
By reversing the procedure to a hammer click being heard from no hammer click being heard will set people up for failure. And as HJ said most WB matches do not have a loading table officer to double check loading of the M12.
Tully
P.S.
Allie and ST, thanks for the kind words.