I think if one had the presence of mind it wouldn't make much difference and could make a brain/spine shot that counted. Of course, that is alot easier said than done.
An advantage of a double, if one has an advanced presence of mind, is to fire both barrels simultaneously. It could make a differnce in some circumstances.
Can I see a show of hands of those that could exhibit an advanced presence of mind in a charge?
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Bill Stewart
Once you have been amongst them, there is no such thing as too much gun.