As has already been mentioned there are lots of over/unders with the muzzles even farther apart. Also, see Tom Kidd's article in The Double Gun Journal, Volume Two, Issue 1, page 22, for a high grade Ansley H. Fox with widely spread muzzles. I have carried and shot my RBL-16 a lot in the five + years I've had it, while the 12-, 20 and 28-gauges have pretty much been man cave decorations. I've been shooting quite a bit of Skeet with the .410-bore this spring. From my view, the gap isn't an issue. FWIW, my RBL-12 is one of the lighter weight ones built on the same frame as the RBL-16.