Beretta has produced the 686/687 series 28 gauge shotguns on both the 20 gauge frame and the so-called "baby frame". I am in possession of four of these Beretta 28 gauges. Two are on the 20 gauge frame and two are on the baby frame. My 686 Black Onyx and a 686 Covey are on the 20 gauge frame. My 686 Silver Pigeon I and a 687 EL Gold Pigeon II Sporting 30" two barrel set (28 and 410) are baby frames.
I have difficulty determining which frames are which, unless I bring out the calipers and measure them. Oddly enough, while the baby frames are both narrower and shallower, the firing pin holes are the same distance apart on all of them! Personally, I find no difference between the two frames in shootability, any difference is minimal, IMHO. Others apparently feel differently. My favorite of the four is the 687 EL, but for reasons that have nothing to do with the frame size.
Doc, you are obviously a clay pigeon shooter!
