Stop and check the adjustment first
Before you do anything to the shooters, you more likely have slack in the accelerator pump linkage or a way too weak spring, but more likely slack in the linkage. While shut off and at minimum idle, barley move the throttle blades and see if you have a pump shot with the least movement of the throttle blades. It you don't you need to adjust the spring tension at the pump lever to take up that slack. Then after making sure this is responsive you can begin changing shooters and cams in that system.
Float level being low can also cause low speed stumbles.......
Bruce