Can anyone tell me whether they have had success in using BA's
executive club silver card to access the AA admiral lounges during
their domestic travel in the US while supplying their AA frequent
flyer for the actual flight to accrue miles for the flight and to get
upgraded?

I am an elite flyer on both AA and BA but I don't have an admirals
club membership and would like to know if this would work.

Thanks for any insights/experiences.