The implementation of COR (Coefficient of Restitution) guidelines in golf has been a topic of debate among players, particularly those with varying swing speeds. Some argue that these guidelines effectively penalize players with higher than average swing speeds, while simultaneously penalizing players with slower than average swing speeds.

For players with higher than average swing speeds, the COR guidelines can indeed pose challenges. These guidelines limit the trampoline effect of the clubface, which means that the ball doesn’t spring off the clubface as forcefully. As a result, players with faster swings may experience a decrease in distance and overall power. This can be frustrating for individuals who rely on their swing speed to generate long shots. Consequently, these players may feel that their natural abilities are being penalized by the COR guidelines.

On the other hand, players with slower than average swing speeds also face difficulties due to the COR guidelines. Since their swing speeds are inherently slower, they may struggle to achieve the necessary ball speed to maximize distance. With the limited trampoline effect, their shots may fall significantly short compared to players with faster swings. This can be discouraging for individuals who already face challenges in generating power in their swings. Therefore, it can be argued that the COR guidelines penalize players with slower swing speeds as well.

However, it is important to note that the COR guidelines aim to maintain fairness and integrity in the game of golf. By limiting the trampoline effect, the guidelines prevent an unfair advantage for players with exceptionally high swing speeds. They aim to ensure a level playing field where skill, technique, and consistency are the primary factors in achieving success.

Ultimately, while the COR guidelines may present challenges for players with both higher and slower swing speeds, their purpose is to maintain fairness rather than penalize specific individuals. Golf is a game that requires a combination of various skills, and adapting to these guidelines is part of the challenge all players must face.

The average golfer’s swing speed is an important factor in determining the guidelines set by the USGA (United States Golf Association) and the R&A (The Royal and Ancient Golf Club of St Andrews) for the Coefficient of Restitution (COR). The COR guideline measures the trampoline effect of the clubface upon impact with the golf ball, determining how much energy is transferred and ultimately influencing the ball’s distance.

Extensive research and analysis have been conducted to establish the correlation between swing speed and the desired COR value. It is crucial to strike a balance that ensures fairness and consistency in the game. The USGA and R&A have taken into consideration various factors, including the average golfer’s swing speed, to set the COR guideline.

The swing speed of the average golfer generally ranges between 80 to 90 miles per hour (mph). However, it is important to note that swing speeds can vary widely depending on several factors, such as age, physical fitness, skill level, and technique. Thus, the COR guideline considers a range of swing speeds to accommodate the diverse golfing community.

By considering the swing speed of the average golfer, the USGA and R&A aim to strike a balance between allowing for maximum performance and maintaining the integrity of the game. This ensures that golfers of all skill levels can enjoy a fair and competitive playing field while still challenging themselves to improve their swing speed and overall game


What Is The Exact Swing Speed Range Used To Develop COR Guidelines?

While the exact swing speed range used during these tests may not be explicitly disclosed, it can be assumed that a broad spectrum of golfers with varying skill levels and swing speeds were considered. This ensures that the COR Guidelines cater to a wide range of players, from amateurs to professionals. It can be assumed that long drivers were not considered in this guideline.

Ultimately, the range of swing speeds used to establish COR Guidelines is a result of comprehensive research, testing, and analysis by the governing bodies to maintain a level playing field for all participants while promoting innovation and technological advancements in the sport.


COR is a good guideline to be considered for average golfers and professionals playing in the PGA and other series. This was probably one of the factors considered when the USGA decided to remove long drive from its purview. For those whose swing speed falls below or above the average, COR at .83 does, in fact, penalize their efforts and results.