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Hi bk40,
Your question is a good one. I assume your interest in sub- 12 gauge is based on reluctance to deal with recoil or economics. Recoil in 12 gage can be dealt with in ammunition selection. I'm not sure you see great savings with ammunition or weapon costs as the home defense gun can be any used pump action brand. The shotgun is a club, a shovel, a tool that really doesn't need a lot of care and can be purchased for less than $100.00 if you shop. The ammunition? That's a factor of frequency of use.
The real issue in selection should be based on wound ballistics. If your selection is capable of penetrating 10 to 12 inches of ballistic gelatin, the round is considered acceptably lethal against a human threat. The magic BB theory says a BB can theoretically debilitate an intruder, but I wouldn't recommend testing that one. Remember the balance of speed accuracy and power? Balancing power means selection of caliber as large as can be effectively discharged by the shooter.
[This message has been edited by Harry Humphries (edited March 05, 1999).]
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