https://battlelog.battlefield.com/bf4/battlereport/show/1/1211037583423969408/1877741414/ 

147 kill  | 64 Headshots > 50% one round

https://battlelog.battlefield.com/bf4/battlereport/show/1/1210945241924857152/1877741414/

143 kill  | 60 Headshots > 50% one round

The previous post gave an error and I thought it had not finished. Sorry for the duplicate post.