I run a Benelli Nova. Short Stroking a pump is always a concern. My gun has the action bars modified by a friend who calls his small outfit Red Neck Tactical. You can find him here or on facebook under Red Neck Tactical.
The action bars allow the shell in the magazine tube to release after stroking the gun only 2 3/4" which is the length of the shells we shoot in competition. You can still short stroke the gun but it requires less of a stroke to keep the gun running. Its a really an ingenious deal. He is working on making a complete replacement set of bars that only allows the gun to stroke 2 3/4" of an inch which will make the action shorter and faster.
Here is a picture of my competition Nova.