Re: Torn between 2 guns
Yes, the .243 is better than the .308. Personally, I would put it toward the overbore end of the spectrum, with the .260 and 7-08 being closer to center. IMHO, the .260's trajectory improvement over the .308 is similar in a lot of ways to the improvement of the .30-'06 over the .308, without the additional energy and recoil being brought to the equation. While maybe not as much as the .30-'06, the .260 also delivers more energy at longer distances than the .308. Given my druthers, I'd choose the .260 over the 7-08, but the main reason is not performance, it's a more varied bullet selection.
BTW, a 7mm-<span style="font-style: italic"><span style="font-weight: bold">06</span></span> is a .280 Rem. I've been load testing one with 120gr 7mm Nosler Ballistic Tips in a factory stock Ruger 77 MKI V, and finding that the accuracy is surprising. Recoil is on a par with a .30-'06 shooting 150gr's, but these babies are getting up to around 3100-3200fps as opposed to regular .30-'06 velocities.
Talk about giving a 'Chuckie a colossally bad day way out there in the hinterlands...
While the .280 and 7mm chamberings are not on the L-W list of finished Savage barrels, the 7-08, and .280 Rem are on their reamer list and these chamberings all use the same .473" nominal bolt face diameter as the .308. I am virtually certain you could get a 28" finished Savage barrel in any of these chamberings from them, and prices should be roughly on a par.
One final note about 'long action chamberings' in a short action. While it's true they won't work in a magazine, they will still chamber fine as a manually single fed cartridge. They won't eject an unfired cartridge in their normal configuration, but in those rare instances where that would be needed, you just pop the bolt release, withdraw the bolt a tad further, and <span style="font-style: italic">Voila</span>, ejection is achieved. I find that fired '06 length case eject just fine from a short action.
But the real answer is to do your switch barrel build on a long action. Savage sells them separately.
Greg