On a related note, several of the Marine squads sent to Beijing to rescue the people trapped in the concession compound were elite marksmen, equipped with the 1895 Lee-Navy straight pull bolt action rifle. Before the Marines' arrival with their "funny" straight pull small bores, the Chinese Hanyang Type 88 rifle chambered in 7.92x57 Mauser was perhaps the best sniper rifle available in Eurasia and Chinese snipers equipped with them had been laying waste to the concession area, killing hundreds of people both civilian and military, young and old. For two weeks, the Marine snipers dueled with their Chinese counterparts and very shortly after, it was discovered that the small, pencil thin 6mm rounds were more than a match for the Chinese .30 caliber rounds. The Marine snipers' kill ratios were soon 3 Chinese to 1 of their own, and after the 12th day, the Chinese decided they did not want to play anymore and hauled ass out of there.
The 6mm Lee-Navy was the very original precision smallbore, and it is the direct ancestor and inspiration for the modern high velocity .243 Win., .22-250 Rem., and of course, the 6.5 Creedmoor...