Need a Mechanism to Propel Small Fertilizer Pellets About 2 Feet

I’m designing a system that needs to propel small fertilizer pellets about 2 feet (60 cm) while keeping the discharge localized and accurate.
My first idea was to use a solenoid as the actuator, but I’m running into a problem: the solenoid’s stroke is too short. Because the fertilizer pellets are small, they absorb a lot of the impact energy, so they don’t achieve the distance I need.
I’m looking for a simple electric or electromechanical mechanism that can repeatedly launch small fertilizer pellets approximately 2 feet with reasonable accuracy. What mechanisms or actuators would you recommend?