Yes, a "20 gauge" is just another word for the .410 shotgun.
10 gauge shotgun
Yes, if it is a 10 gauge shotgun.
There are a few places where one can obtain information on a Hugh Hastings 10 gauge shotgun. Information on this gun can be found through gun value books or through local gun dealers.
Pawn shop, gun show, want ad, gun shop
It is difficult to find even 10 gauge shotgun ammo today. I have my doubts if 8 gauge shotgun ammo is even made any more, but corrections welcomed.
A 10 guage is more powerful with more kick and better range, a 12 guage is the standard issue hunting and war shotgun, it is better if you are not an experienced shooter, it also depends upon what you're doing with the gun
Try gun shops, gun shows, want ads, e-gunparts.com
Sounds odd...what exactly is your question? shotgun receivers can be attached to different sized barrels. It is also possible to lower the gauge shell that a gun can handle by having a large gauge barrel fitted with pipes that lower its gauge.
well depends what kind of gun here are some,PISTOL:9mm,10mm,.22,25,380,357,40,357sig,50ae,45.RIFLE:22,223,222,308,7.62x39,7.62x54r,338,300,.17,.50,7.62x51nato(almost the same as 308) and 5.45x39.SHOTGUN:.410,12 gauge,16 gauge, 10 gauge.
A Winchester 1887 10 gauge. The same type as in T2
Try the library and old gun catalogs.
Want ad, pawn shop, gun shop, gun show, internet auction site