Any evidence you have? I have the following - 3.88% of failures for Proton-K, 10.81% for Proton-M. Proton-M is a modern RUssian build, Proton-K is the old Sovie

Any evidence you have? I have the following - 3.88% of failures for Proton-K, 10.81% for Proton-M. Proton-M is a modern RUssian build, Proton-K is the old Soviet one. Proton-K had 311 launches, 34 failed. http://habrahabr.ru/post/185664/ http://habrahabr.ru/post/185664/