You're talking about a firearm that is at least 50 and possibly 100 years old, so before you even think about shooting it, have it checked over by a competent gunsmith. Then ask him about the ammunition.
Actually the shotgun uses 16 gauge shells i have the same shotgun
1915 c n Newport 12 gauge coach gun
No such gun. Check model and repost, please. 20 gauge shells were not created in 1812.
A Winchester 12 gauge model 1200 pump shotgun holds 2 in the tube and 1 in the barrel. So it holds 2+1 which makes 3 total.
Ensure you look at the stamped shell gauge on the side of the receiver (12 or 20 Gauge). Should be able to take 2 3/4" and 3" shells.
I have a Model 67h, The magazine holds 4 with one in the camber.
If your shotgun is a 12 gauge pump, then you have a High Standard Model 200 (Flite King). The standard 12 gauge shell is a 2 3/4 inch shotgun shell. It can be anything from #8 birdshot to a deer slug.
If it's a 16 gauge shotgun, the shell length is 2 3/4 inches.
You need to have it examined bya good gunsmith.
The Western Field model 30 pump action shotgun and the Stevens model 520 shotgun are one and the same firearm.Savage/Stevens made these for Montgomery Wards.The shotgun in question should show that it was chambered for the 12 gauge shotshell.The length of these shotgun shells were 2 3/4in. If your shotgun is not marked,I would have a gunsmith make a quick check of the chambering for you.This will only take a couple of minutes to do.
12 gauge
Your winchester model super X2 should hold 5 rounds of shotgun ammo.