If the barrel was stamped 99C then I'd guess it was a special order, gift from the company or an employee made it. They had barrels in 250 because of 99CD's, 99A's and late 99E's, so would have been trivial to produce.
A parts gun after they dropped the 99E and wanted to use up that lone remaining 250 barrel would be reasonable also.
“
The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at
www.savagelevers.com
