I have had this same gun for severall years and shoot it twice a year with no problems. I would take it to a gun smith to have it looked at to make sure it is safe since you need to ask the question.
All day long. Any shotgun can handle shorter shells than it is chambered for as long as they are the same gauge.
yes.
12-70 is frequently used to indicate the gauge of the shotgun followed by the length of the chamber in millimeters. In the US, or non-metric measurements, that means a 12 gauge shotgun chambered for 2.75 inch (usually read two and three quarter inch) shells. Sometimes, you'll see 12-76 to designate a 12 gauge shotgun chambered for 3 inch shells.
You would have to list the model number of your shotgun,to identify the maker of your sears and roebuck shotgun,in order to get the correct buttstock.
I believe that your Sears shotgun is a Winchester model 37A shotgun that was made for Sears Roebuck And Co,.
about $100
value of a jc higgins 101-40 shotgun
Yes but not the other way around .You can not use 3" shells in a 2 3/4 chambered gun.
If your Browning auto-5 shotgun is chambered in 12 gauge then it was made in the year 1928.If it is chambered in 16 gauge,then it was made in the year 1938.
Try e-gunparts.com
about $100
You will need to find out who made it first.