Who cares, TD? It's just his opinion and it is worth the same as Joe Schmoe's opinion... approximately nothing.
To restrict a fundamental right, you have to prove necessity. You don't have to prove necessity to exercise one. End of story.
TD, you need not prove anything. Your opposition is the one who has to prove that a 7 round restriction is essential to public safety and will have a major impact on same. He hasn't, and cant.