I'd use the stw and get consistent with a mile. True my gear and program and work on repeatability. After I got where I could get consistent 1st and second round hits at a mile, I'd take what I learned and what I knew, and do the math, and walk my stw out to its max.
By then, I'd know if the bigger investment was worth the $ to obtain my new set goals, and by then you should have some new shooter friends and more ideas.
With my 375, I've learned the limit of the twist, the bullet, and the load. I know where my scope will take me.
I know where/what my next bump is, a better bullet. And I know the load and twist will handle it. And that the scope is going to be at its edge, IF it all comes together.
That's not going to be a really big investment.
HOWEVER, I don't have the distance available, so, I'm not out much at this point, still can build data, experience, and confidence.
Those who know me, know rifle two, faster twist, longer barrel, heavier, higher bc bullet is in the works. Parts crawl into the hood. Slow build investment in progress.
I know I will have to have either an adjustable base or adjustable rings at that point. I'm not at the point of doing that yet.
I can build rifle two up with what I have, prove the rifle at 1000-1760, the ease on out further.
And you can do that with the stw, with graduated goals, and confidence building success.
Go for it.
I have the lapua. I don't see it making 3k. I've shot the stw. I don't know what it will do with your combo. Can't help there.