Honestly the suggestion that an automated MG would be able to shoot down even 100 drones is ridiculous. Machine guns are designed for fire suppression, not shooting down drones with tiny cross-sections.
Here's a quote on the accuracy of the .50 MG used by US troops (same caliber as the MG on the Type-15 but some accuracy differences probably exist)
"At a range of 1400 yards, with a standing silhouette on a 12'x12' target backer, a 50-shot group hit the backer 49 times, but hit the silhouette only 8 times."
The size of the human silhouette is not mentioned, but generally they're anywhere from 40x60 to 50x70 cm.
Here's a quote on the accuracy of the .50 MG used by US troops (same caliber as the MG on the Type-15 but some accuracy differences probably exist)
"At a range of 1400 yards, with a standing silhouette on a 12'x12' target backer, a 50-shot group hit the backer 49 times, but hit the silhouette only 8 times."
The size of the human silhouette is not mentioned, but generally they're anywhere from 40x60 to 50x70 cm.