First, DON'T waste your time trying to achieve this early, as I DID
According to the official RDR2 guide,
1. "This can be achieved after [Paradise Mercifully Departed] in Chapter 5"
2. Chapter 6 will have 1.5x multiplier, so it will be easier to get in Chapter 6, but NOT must.
3. This is a list of Honor point by each event affects it: