Beside penetration, not all buckshot patterns are equal. I just did some pattern testing today using my Benelli M4.
I compared:
Wolf Power Buckshot 2-3/4, 9 pellet 00 buck ($.60 ea in qty 75) to
Federal Premium Tactical Low recoil 2-3/4, 9 pellet 00 buck ($.70 ea in qty 500).
At 5 yds., the Wolf pattern was 4.5" x 3.25", the Federal 1.5" x 2.5".
At 10 yds., the Wolf pattern was 8.5" x 8", the Federal 4.5" x 2.25".
At 15 yds., (not HD distance) the Federal still was only 4.5" x 5.5" and
At 20 yds., (definitely not HD distance) the Federal was 7" x 6"
I like the tighter pattern to minimize possible collateral damage. At HD distance both would do the job. With the Federal Low Recoil shells tho', I was back on target in 1/2 the time of the Wolf.