Cobray- The barrel on savage is a heavy rifled barrel
that was part of a bunch, for us guys building these.
I never asked about their standard 12ga barrel.
Don't know if they had a standard one. Ours
were 2.25 inch rifled blanks from alloy steel like used in
rifles.Them we shaped them to contour on lathe and
threaded them for whatever action used and
put our long case chamber in them.
In testing the 1887 levergun we found that we
won't use AA-1680 with plastic cases. Of my loads
use only RE-7 powder in plastic.Ed