Like Cottontop said,Just run the brass through your resizing die and check the length,trim if needed. I always debur my flash holes on all of my brass for a consistent powder ignition from the primers,as well as chamfer the inner/outer sides of my brass after trimming.
Your Savage should shoot almost any bullet weight from varmint bullets to the heavy match grade bullets. I personally like to use 140 gr Sierra Gamekings for hunting,and Berger 140 gr VLD's for long range target shooting or hunting also.
There are many different powders that will work great with the 6.5 mm family. H4350 is very common,as is H414,Hybrid 100V,Winchester 760,Reloader 15 or 17 and many more will work for the 260 Remington.
Look here for a bunch of load data-http://data.hodgdon.com/main_menu.asp
Texas State Rifle Association
North American Hunting Club