Dave,
Great post, well thought out and concise. What else should we have come to expect?
I am with you 100% regarding the HD considerations you posted. As always, each of us may have particulars that warrant deviations from the norm you and I and most others have to ascribe to. What surprised me was how little your setup and ours differed. Maybe you are starting to rub off on me?
I tend to load the 870 (7 shot tube) with two rounds of #6 lowbrass birdshot up front, followed by four rounds of reduced recoil 00 buck or S&B 12 pellet (they call it 00 but I consider it 01 buck). As you mention, the female companion here is the consideration given for the lighter loads, coupled with reduced recoil for myself (distances less than 35'). Additionally, the birdshot comes into play should dispatching a varmint take center stage on the property. Differences in weapon condition is the action is closed, chamber empty, safety off. Do you see any drawbacks to this configuration?
Normally, I load 2 rounds of #4 Remington high brass (as Rob96 says he does) followed by 4 rounds of full house 00 buck or 01 buck 2 3/4" when it's just me, leaving one slot open in order to sleeve a birdshot load or slug (this is still possible if S&B buckshot, known for it's additional length, is kept to four rounds in the tube, maximum). Like yourself, I keep a few slugs hung on the firearm proper, just in case. Also, I keep a bandolier with extra buckshot at the bedside should things protract (damned scary if I ever really think about it).
I practice a lot with what I keep in it for HD and am having her get acclimated. Patterning has demonstrated effectiveness with the RR and S&B buck loads out to 25 yards (okay for non-buffered shot). Birdshot is naturally less. I still have not obtained any Estate shells for evaluation. Eventualities. Is their length more consistent with standard shotshells?
I also returned one of my Wingmasters (the HD one) back to the original stock from the Remington factory overfolder to ease her use with it. The sharp recoil of the metal buttplate was making her gun shy. Lowest common denominator. I understand and respect your sentiments regarding those abominations, but I simply have to have a pistol grip with rifle sights. Perhaps you could recommend a folder (side or top) with better handling characteristics than that which I am employing?
Also, have you done anything to improve the Remington safety on your 870's? I find the small trigger guard button "odd" after using the Mossberg 500 series for so many years. Would a larger replacement one help or be problematic?
As a twist, what say you about ammunition selection for a double barrel or over under?
Thanks for taking the time to address some of the most important issues regarding the shotgun in the self defense role. My belief is that the shotgun, employed correctly, is the most effective home defense firearm available. Your post assists those who opt for one to get to the point regarding ammunition selection.
Ah, were ammunition manufacturers listening to your insight on 2 1/2" shells (I am assuming they would work in the 870 - those little Aquila monsters sure didn't!). A tailored shell line made for home defense and the potential for higher capacity (+1?) in a reliably feeding package. Ramp up costs would be a bit chilling, initial costs prohibitive? Still, the payoff might well be worth it considering our present state of economic affairs if costs were comparable.
Should some manufacturer ever take up the idea and make it a commercial success, you can always claim you thought of it first!