Alas I am primarily just a hunter with my two 99f's in 358. My screen name Savage_99 means that I like rare beef at 99F.
There is an excellent section here at 24hr, the Savage Collectors, or whatever its called. They can help you with anything to do with 99's however those 99's take a scope so easy. Consider having scope mounts put on it.
Nor am I a .25" guy. Check that the standard 1-10" Roberts twist is fast enough for the longest modern bullets in that caliber. Get the best twist for the best bullets. Your in BIG game country.
