I only know about the A300.
Recommendation is to not exceed 1000 psi brake pressure without anti skid. A fully charged accumulator will be at 3000 psi. This will give about 6 brake applications before the stored pressure is dissipated. Best practice is to apply brakes gently and have another crew member call the indicated pressure so you can adjust foot pressure accordingly.
Yes you can lock a wheel with 1000 psi if the surface is slippery.
Yes I have been part of a crew that did this for real with a dual hydraulic failure, and we did not flat or burst any tyres.
Me in middle seat.