What does that have to do with another's success. You seem to do well with your .30-30...So what? What does it prove? Actually nothing, except it works for you.
And that .30-30 would be far from a first choice of the "successful" Deer hunters I know. But again, that would prove nothing.
The most successful deer hunter I ever knew used a .30-30. Course he didn't let bag limits get in the way of his fun and routinely killed 4-5 bucks every season. He had killed well over 200 bucks right here in NY before he died. Those who don't use one tend to underestimate their effectiveness and suitability for woods whitetails. I have many scoped bolt actions from which to choose but most often a .30-30 will be in my hands if I'm going to hunt the woods. It will do everything that needs doing to kill whitetails.
Everybody I knew that put up numbers like that used a 22 mag
