If you can make out the lettering on the green cartridge, it reads 10-gauge. Becky is pretty short, at only 9.5" long. 3.5" of that is for the cartridge casing, so technically she's only 6" long. To get her that short and still be 10-gauge, she needed to be a single shot. But if you can't hit what you're aiming at with a barrel that short, you deserve whatever comes your way. At 15', the spread is nearly 18" wide.