Every FAA inspector I've spoken with, right up to AIR 1 (the head of airworthiness) consider any propeller change except direct replacement of the same make and model to be a "major change". This is due to possible performance, reliability, and weight/balance differences. Thus, any propeller change that involves a different make/model of propeller should be approved through the "major change" procedure called out in YOUR specific aircraft's operating limitations.
Operating limitations, including the major change provisions, have changed a lot over the course of years. So there is not one all-encompassing procedure that I can outline. For example, operating limitations issued many years ago stated that a major change invalidated the airworthiness certificate and a new certificate must be applied for. Fortunately, these operating limitations were superseded long before most RVs were built. But many may require contact with the FSDO before performing the major change, while others don't require contact with the FSDO at all. Some require a new 8130-6 when going to or from fixed to adjustable props, and others do not. It all depends on when your operating limitations were issued.
It's VERY important that you read YOUR operating limitations and follow the major change provision therein. If you don't like the major change procedure that was issued to your aircraft (or any other verbiage in the operating limitations) you can apply to have the current version issued. However, most owners just live with what they have.