I would laugh me ar** off to see you try to shoot a black widow.
I think I would have to wonder if maybe you've taken a wee bit of drink, earlier in the day?
At near point blank range, BB guns can do the job nicely, however, I usually "shoot" black widows with a can of Raid. I did squish one once with my bare hand, that was kinda gross, they do have a fair amount of guts.