Pattern tested my new Nova with buck shot. The choke tube is whatever comes on the gun new which is probably modified or maybe full. With a target at 50 yards I tested 2 3/4 and 3 1/2 shells in 00 buckshot. The 2 3/4 shells put one or two pellets more on paper than did the 3 1/2. I did not have any 3" shells to test. Wonder why the 2 3/4 would outperform or equal the bigger 3 1/2?