A straight 260 with 140 berger VLD's will do everything you are wanting, or go with a 300 WSM in a long action so you can seat bullets out long in the cases.
I clean bore completly out when the group starts to open up to about 3/4", until then its just runnig a bore snake through around every 400 - 500 rounds.
I have a Choate Tactical that is inlet for CDI bottom metal but think Savage bottom metal will fit. It has 4.40 spacing and low to medium cheek riser it is black with silver and black webbing. Will sale for $245 shipped in USA.
I am shooting Berger 105 VLDs and Hybrids in my Savage model 11 .243 with A.I.C. mags. with O.A.L. at 2.801" at 3160 ft/sec. and they feed smooth. It has a 28" C.B.I. barrel and will shoot through 30 caliber holes at 100 yards.
This is about the longest OAL you can shoot in factory box mags.