TC 3-20.31 establishes the training strategy for crews to attain lethal proficiency by engaging and destroying threats efficiently in any operational environment.
Training Circular 3-20.31-120 Gunnery: Heavy Tank - U.S. Army
Don’t just save the file. Pull the relevant pages (e.g., Tables VI/VIII scorecards, misfire flowcharts) into a laminated quick-reference card for each crew member.