Nope, my father has a 16 ga A-5, that was produced before the Sweet 16 was introduced.
Ammo costs two - three times as much as 12 or 20, and is kind of hard to find in a wide variety of loads
Have to disagree with you there...,
Federal 12 ga 2.75" 1 oz of shot in 6, 7.5, or 8 shot, is $7.77
that same load in a 16 gauge from the same maker is only $9.77
In a 20 gauge from the same maker using 7/8 oz is $7.97
Estate Brand 12 gauge 2.75" 1.25 oz in 6, 7.5, or 8 shot is $10.17
Estate Brand 16 gauge in the same load with 1 oz of shot is $10.17
Estate Brand 20 gauge in the same load with 1 oz of shot is $7.77
Remington "Pheasant" 12 gauge 2.75" 1.25 oz of shot, 4,5,6,7.5 size is $14.27
Remington "Pheasant" 16 gauge 1.125 oz in #6 only is $14.27
Remington "Pheasant" 20 gauge 1 oz of shot 4,5,6,7.5 shot is also $14.27
http://www.sportsmansguide.com/
Fiochi "Golden Pheasant" 16 from Midway is $15.49, 12 ga is $16.79
Fiochi Filed Loads in 16 are only $10.29, 12 gauge is $9.59,
Remington "Game Load" in 16 from Midway are only $7.49
Now for target loads when buying a "flat" of shells, numerous boxes 'cause you compete, the 12 and 20 will save you lots of money, but it still aint 2x or 3x the savings compared to the 16.
LD