I've owned two different Remington heavy barreled .22-250's (both 1-14" twist) and were capable of consistent .25" with reloads. Factory ammo ran groups out to approx. .50". I also owned a Savage 110 FP in .223 Rem. (1-9")
that shot .1 - .3's.
If I were to purchase another it would be a Savage with the 1-9" twist, only because Remington doesn't offer that barrel with theirs. I rather have the HS Precision stock with aluminum bedding block, but would settle for a laminate with bedding pillars, if that's all I could get. I think the Savage runs a little less (price wiise) and any extra cash could go toward glass.
With that, I would go with a 20 MOA Picatinny base/ring setup and scope would be in the 6-24 range. Good luck...JohnnyK.
"The pleasure you get from life is equal to the attitude you put into it."