They do and have been for many, many years...the problem is that they're very expensive coming from the European Custom Makers...
The alternative is for a drilling (dreiling) 3 barrel gun--whether SxS shotgun or rifle over a single barrel rifle or shotgun...I have a 9.3x74mm dbl. over a 16 bore single and I have a 16 bore dbl. over 9.3x74mm single...They also come as three shotgun or three rifle and they can be all in the same bore/calibre or all three can be different 5.5/6.5/7.5 is one combo as is 7/8/9.3
with a 5.5 insert...You can add inserts to the rifle or shotgun barrels!
These guns came about because the Landowners would allow their people to own
only one firearm, period! For self defense and big game hunting and bird hunting and feral hunting--one gun, that's it! So they added another barrel to anything they had; single to double, double to triple, triple to quad in a variety of chamberings to encompass all their needs and still remain within the law...Most common is/was the Cape--rifle/shotgun double SxS and by a major amount the drilling with the Vierling (4 barrel) dead last and since there have been only two or three five barrel guns made, ever, they don't count...You can get an insert for your shotgun barrel from Briley et al, that will shoot rifle calibres out of it to make any double shotgun into a combo...
German commercial makers with drillings and single shots, and Cape configured rifle/shotgun SxS or O/U...
Krieghoff,
Heym, Merkel, Blaser...Also check
Drilling Hotline and
CalPappas--mainly double but has had Combo/Cape guns and dealings...Custom makers by the droves will put anything together for you...
The problem is that here we either have the
"Survival Rifle" .22 LR/410 gauge or the imported Valmet line from Russia that Remington imported and rebadged the SPR94 again a .22/410 combo...They might be great for small game hunting and short term survival but defense or hunting any size or distance would be really hard...Then there's the Savage 24, which hasn't been made in about what 20+ years, but came in some really nice combos eg. .30 WCF over 12 bore... So then if you can't find a Savage 24 or a Euro made gun you're screwed!
Take the plunge, go for a triple, a menage d'trois, join the big leagues, you won't be sorry--well, maybe you will when the tenth or twelfth drilling goes in your safe...
Full Stocked Steingass Drilling by Krieghoff
Blaser B95/97 O/U Rifle Calibre Chart
20/76 = 3", 16/70 = 2¾", 12/76 = 3" shotgun barrel over any ot these rifles barrels:
.22 Hornet, .222 Rem, 5.6x50R Mag, 5.6x52R, .243 Win, 6x6 R Frères, 6x70R, 6.5x55, 6.5x57R, 6.5x65R RWS,
.270 Win, 7 x 57R, 7 x 65R, .308 Win, .30-06 Springfield, .30R Blaser, 8 x 57IRS, 8x75RS, 9.3x74R,
My favourite calibre is the 7.7 x 57R or the .303 British
Hotline has this older model for sale that is great for elk, moose, bear--it's also the cheapest gun they're selling...
Thieme, Schlegelmilch, Nimrod, Gewehr
Side Lock Hammer Drilling with Weaver Scope
16x16 over 9.3mm $2200
The rest start at $4,500 used to $8,000 for a very plain Jane new one...