The Ruger American is a piece of junk. One of my students showed up with it in 308. the rifle bore was bad and was scraping the cartridge. The bolt broke on the 3rd round as a piece flew off, round would not eject without being pushed out with a cleaning rod to free the bolt. Ruger has it now and is sending him a brand new rifle instead of fixing the old one. If you would like, I can get him to sell it to you cheap! Instead he bought a Remington 700 SPS tactical 20" barrel in 308 and I am setting it up for him over the next week. Try a factory round in the 155 grain weight or as close to 155 as you can find. The Remington would be much better than a Savage in my opinion.
Thanks - Capt. Craig