Consider a Rem 783 HB version. These came with a larger bolt knob, rail and fatter contour. All 3 chamberings were offered and with a little bedding, they can shoot sub MOA. Firing pin spring can be crap but an easy swap with a Rem 700 SA spring. Prefits are available and then they can shoot with any custom action.
simple, inexpensive, lots of excellent engineering. Some are asking alot for a used rifles but new rifles are now coming into Canada so used prices should start to soften... or you can get a new rifle for similar money... and maybe these solved the firing pin spring issue?????
I would also lean you to the 223 Rem as a good chambering to start with especially if going factory ammo. in general, varmint ammo is made to be accurate, way less money and no issue reaching 300 with good results.
The 783 twist should be a 9 so will handle most bullets weights to 75gr. My factory barrel shot really nicely. Given the costs of components and lack of LR primers, the 223 Rem is a far easier option when you want to reload with a match barrel.
Fast twist and heavies, out beyond 1000yds is easy.
Jerry