Well if it ever gets stolen, you know who to send the cops after, 'cuz only the local football team will be able to move it!!

Definitely going to make a HUGE difference in your groups, that wire table is definitely something one of my old coaches would have called, "not conducive to accurate shooting."

One thing you might want to add - grab up a bit of 5/8" trim board and run a 1/2" lip proud around the edge on the front and sides. Helps prevent cartridges and cases from rolling off of the edge. Probably less important for you since you're shooting break actions, but if you use it for side port ejecting rifles or pistols in the future, it's pretty handy having a lip to catch things.