I am looking at getting a savage model as BTCSS in either 223 or 204 ruger. I have this gun in 17 HMR and really like it and now want to move up to touch critters at a longer range. I have looked at the 223 but noticed the 204 ruger. THe spec difference as I see it is the twist in the barrel. Does anyone out there have any first hand experience with these two and what is the actual practical differences.