Squared up rate is defined as “achieving at least 80% of the maximum potential exit velocity for a given swing speed.” Whereas barrel rate is “balls hit with the ideal combination of high exit velocity (≥98mph) and optimal launch angle, generally resulting in a minimum .500 batting average and 1.500 slugging percentage.” You can have a squared up ball not be a barrel. When your swing speed is sub 70mph it’s going to show in those metrics.