What IS the condition?
I have a couple of Stevens made .25 Stevens chambered barrels that came to me with Black, Cruded up bores that a .22 Bore Brush would not go through by hand.
After a LOT of work, they cleaned up to look Pitted And Ringed with Thin rifling But Shoot reasonably for Both Their and My Age. It seems Stevens cut his barrels toward the small end of Bore/Groove tolerance for .250" bullet use so they would give more accuracy with available Ammo of the time.
Before "Writing Off" the Rifle or Barrel shoot it after Cleaning.
Use a about 67 Grain Lead Bullet or a 50 Grain FMJ RN bullet to test the Accuracy of your Barrel and Stay Subsonic in your loads. The original .25-10-67 RF cartridges usually were listed as 1050 to 1120 fps (BP) or about 950 to 1000 fps (Smokeless) and considered good Target combinations out to about 150 to 200 Yards, shooting "Off Hand".
I am guessing your rifle has a History of Squirrels or Rabbits taken at about 50 to 75 yards, for Family "Pot Meat". which would mean about "Minute of Squirrel" in the hands of a Young Shooter of the Era.
Best Regards,
Chev. William