OP, if you’ve been reloading for 40 years, then you’re at least 47

.
I’m going to suggest against the factory rifle approach for three reasons.
First, as much as we all admired our single shot Savages, they have gone up in price, nearly doubled, but they haven’t improved much if at all since the 2000’s. As an example, the 6.5-.284 was on the way out in open when they offered only it and the 6 BR, and I don’t think Savage ever made the 7mm transition on their F-Open gun. I credit them for persisting from a time when their peer set could still place in a club match, - the Winchester Coyote, the Kimber Rangemaster, the Browning A-bolt Target and even a Sendero, I used them all. Only the Ruger target remains, maybe, which was always stretching it, anyway, in this game. In other words, the only guns left to compare them to are full customs, and that’s not as favorable a comparison as romping the other factory guns was, in value, almost 20 years ago.
Secondly, I believe the performance gap has actually opened up. Instead of being the best shooting, heaviest factory rifle on the line, now they are assured of being about the only one, and there is a good chance that without a barrel upgrade, your factory choice will be shooting the largest group. The best scores have gotten ridiculous since these guns came out; whereas before they may have been hard pressed to win, they were at least closer and/or could threaten. They had a TR team I no longer hear about. Presently, they may not even chamber or stabilize your first several choices of bullets and cartridges, or your future ones.
Third, they are just good enough, especially modified to significantly drag out the road to your best performance, time-wise. Fclass is a mature endeavor now, make the curve as steep as possible to level out soon. Only juniors really have the luxury of time to meander. If you have been reloading for 40 years non-competitively, and watched F-Class for the 20 or so it’s been getting big, then you are a deliberate guy, - but I respectfully say it’s time to stand on the gas pedal because in addition to the gun, the ammo needs to be exceptional, shooting skills refined, and wind reading embraced, all of which are worthy of their own written volumes, and compete for your attention. The rabbit hole beckons. It’s worth it.