No offense, but Lyudmila beat his record:
“Lyudmila Mikhailovna Pavlichenko[a] (née Belova; July 12, 1916 – October 10, 1974) was a Red Army Soviet sniper during World War II.[1] Credited with 309 kills, she is regarded as one of the top military snipers of all time[2] and the most successful female sniper in history.[3][4]”. (excerpt from Wikipedia)
“Lyudmila Mikhailovna Pavlichenko[a] (née Belova; July 12, 1916 – October 10, 1974) was a Red Army Soviet sniper during World War II.[1] Credited with 309 kills, she is regarded as one of the top military snipers of all time[2] and the most successful female sniper in history.[3][4]”. (excerpt from Wikipedia)