Complex sentence: The initial standard load for the cartridge was of black powder propelling a round nose flat point bullet at approximately, but in 1886 U.M.C. also began offering a slightly heavier bullet at, also with of black powder.
Split into simpler sentences: The initial standard load for the cartridge was of black powder propelling a round nose flat point bullet at approximately. In 1886 U.M.C. also began offering a slightly heavier bullet at, also with of black powder.