No, 300 murders total.
The population reached ~300k in 1750. A murder rate of 2 per 100k times 300k people equals 6 murders. Multiply that by 50 years to get 300 murders.
The population reached ~300k in 1750. A murder rate of 2 per 100k times 300k people equals 6 murders. Multiply that by 50 years to get 300 murders.
This doesn't affect my 2nd and 3rd paragraphs though.