.338 Federal was not around until 2006. Product of Federal and Sako. So that was not a factory built Savage 99.I have never heard of a Savage 99 in 338 Federal, but they did catalog 284 Winchester late in production run. I have never seen one in person. I have two 99's win fixed rotary mags. One is in 300 Savage which runs close to the 308 Winchester. The other is a 30-30 takedown model. Both wear iron sights and shoot very well. Maybe I will find a nice 243 or 308 with removeable magazine some day...