I live in what was a shotgun only state and the last thing I’d buy is a shotgun or slug rifle. I’ll admit though, the 220 is a very good, accurate and effective slug rifle, I had more than one and my family uses them. Ammunition is expensive. The 12 gauge sucks. Total overkill and unnecessarily abusive. I have no experience with the 30-30 but frankly it makes sense from what you’ve stated. If you like the AR platform, the 450 Bushmaster would be a good choice. It basically replicates the 50 caliber muzzleloader which is super effective on deer at closer ranges. Have fun whatever you decide!