Here's a blurb about further bazooka development.
"The success of the 2.36-inch bazooka rocket inspired NDRC to propose development of a still more powerful type with greater range and a velocity increase from the 265 feet per second of the M6A3 to 500 feet per second. The resulting T59 unhappily proved in tests to be dangerous to the user and quickly became a bone of contention between scientists of NDRC and the Ordnance Department. The former, having let considerable advance publicity concerning their new "super-bazooka" rocket reach the theatres, suspected that Ordnance men were needlessly delaying its production and issue. But post-war developments were to vindicate the Ordnance Department when more than six years' work still failed to remove the bugs from the rockets. Work upon the T59 nevertheless led to investigation of the possibility of a larger antitank rocket, which, like the 2.36-inch, could be projected from a shoulder launcher. While development of a 3.5-inch Navy rocket for air-to-ground fire had begun in February 1944 only to be dropped in March 1945, a 3.5-inch antitank was still wanted. The project was initiated in August 1944. The first experimental model, the T80, was charged with 1.9 pounds of cyclotol. Though it obtained longer range and higher velocity than the standard bazooka rocket, it fell short of that achieved by the the T59 with its eight pounds of pentolite. Yet the cyclotol in the T80 would, research men believed, ensure penetration of 8-inch homogeneous armor plate. Static, flight, and pentration tests in March supplied data on which to base a revised design, but V-J Day arrived before this was proved."
