I have a 30-30 and am looking to get a .223 with probably an 18.5 inch barrel. I believe my Win 94 barrel is right around 18 inches. Mentioning length for maneuverability inside. I was thinking the .223 would eclipse the use of 30-30 for my home defense, heard someone downstairs smashing through the bulkhead into my basement or whatever. I have a little .38 special I keep loaded, although locked in a cabinet, but my plan would be if I have time to load up a rifle that is what would be happening as 911 was being dialed. The 30-30 I believe is a 7 round mag, but a .223 (I'm thinking Mini-14, but don't have one yet) can hold a 20 or 30 round magazine. I like the idea of the .223 because of the rounds it can hold and the rounds are cheaper to use and practice with. This to me is the best caliber for average folks to have a small store of for long term emergency planning. So, eventually I'll probably get one for this purpose. Maybe an AR15, but this isn't a this vs. that question between AR15 and Mini-14. So, what I really didn't know - and I looked up some details on the ballistics, is the 30-30 is not a wound you type of round like the .223 seems to be. I have a couple 20 gauge shotguns, but in all honestly they are so long, they are difficult. Although - now that I think of it - the featherlight Ithaca has a 2nd barrel that was cut a little shorter, think 18.5 inches if I recall from measuring it a year or so ago, but again limited in the number of rounds it can hold. So, anyways - what I'm getting at is, would the extra rounds be better or the extra foot pounds of a 30-30, or even a 20 gauge be better? It isn't really realistic IMO that one would need more than 7 rounds, but I'm just curious what other people do or how they approach these type of questions. I think about it because - it is very unlikely I would ever need anything, but - if I did there isn't much margin for error so I try to think it through.