https://www.govinfo.gov/app/details/GAOREPORTS-NSIAD-96-59
GAO/NSIAD-96-59 - Army and Marine Corps M198 Howitzer: Maintenance Problems Are Not Severe Enough...
https://freenorthcarolina.blogspot.com/2012/08/762x51mm-m198-duplex-versus-ballistic.html
Free North Carolina: 7.62x51mm M198 DUPLEX versus Ballistic Gelatin
Via mpopenker Developed from Project SALVO in the 1950s, this cartridge fires two 84-grain bullets per cartridge. Captured in slow motion ...
free north carolinaduplexversusballisticgelatin