I am 100% with Bowhuntercop and New York Hunter!!! I have 2 Mossberg Trophy Slugsters, 1-12ga and 1-20ga, and since I began shooting the 20ga, the 12 hasn't left the safe. Except to friends who wanted or needed it.
Both have ported barrels, cantilever scope mounts and Burris Slug gun scopes. The 20 will shoot as fast as any semi-auto out there. Accuracy is great with Fed. Barnes Expanders or Winch. Platnium Tips. If I do my part, the 20 will shoot side by side with any muzzleloader out to 150yds in accuracy.
My longest 1 shot kill was 167yds with a Fed. Barnes Expander. Laser Range finder verified. Never took a step. Droppped in a foot of snow and recovered by my son to witness.