I have been very satisfied with my 20g Remington 870 and Mossberg 500. So satisfied that I don't even shoot my 12g very much anymore. The 20g is perfectly acceptable for HD with #3 buck or whatever you choose to use. The reduced recoil of the 20g is also an added plus for follow up shots if the need arises. And 20g slugs are my personal favorite, and I keep a good supply on hand.