– Uneven pressure and tension. Correct your bow grip to reduce excessive pressure, which can be one of the primary offenders for a bouncing bow. Keep your grip soft (but also not too loose), and your thumb relaxed. Additionally, avoid tensing up when you're playing, especially in your wrist and shoulder.
Why does my bow jump?
There are 2 common causes for bouncing bow. Often there is a combination of the 2 at play. Your bow is too tight. You have tension in your bow arm.