US Cartridge, 105mm Practice, M38, M38A1
These two practice rounds differ from the high explosive rounds in regard to filler only. The filler consists of 3.09 pounds of an inert filler made of lead oxide, paraffin, and barium carbonate accompanied by a black powder charge. This black powder charge is 8 ounces in the M38A1 Round, while it is only 5 ounces in the M38 Round. The components are the same as those in the high explosive rounds.