We actually used this technique one time on the DMZ, when responding to a request from a beseiged fire support base. Each tank in our company fired all 15 rounds of our HE load. Most of our main gun load was canister, beehive, WP, and HEAT.
Spent a little time at C2.
298th Signal.
Rough place to be at.
Were you the driver for the M-48 in that excellent photo? If so, were you able to stay dry?