Eric Walker added I had completely forgotten about this! In 2004 Denel requested funding, involving its US partners, for a +- 80km-range 155mm ramjet-powered shell called ProRam. At the time the US Army was toying with longer-ranged options, but ultimately lost interest. https://twitter.com/NazeemSamodien/status/1007970610553769986 to Ramjet shells
Eric Walker added Army's New Huge Barrel Packing 155mm Howitzer Doubles Range To 40 Miles In Tests to a number of topics
Eric Walker added The Army Wants Longer Barreled Howitzers To Fire Ramjet-Powered And Other Special Shells to a number of topics
Eric Walker added a number of links to Ramjet shells, and added Ramjet shells to Artillery shells
Eric Walker added Rocket-assisted 155mm ammunition and Ramjet shells to Artillery shells, and added Artillery shells to Artillery