The real downfall of the Savage 99 lies in the chamberings.
Traditional levergunners like heavy bullets at modest velocities, and the only Savage cartridge to fit this bill was the old .303
Huh?
Savage Levergun Chamberings :
.375 Win.
.358 Win.
.308 Win.
.284 Win.
.243 Win.
.38-55 Win.
.32-40 Win.
.30-30 Win.
.25-35 Win.
7mm-08 Rem.
.22-250 Rem.
.303 Savage
.300 Savage
.250-3000 Savage
.22 Savage Hi-Power
Edited to add: There was also a .410 shotgun barrel offered for take-down models. 
