Will say that I am jealous. Have yet to own an Anschutz.
Had a handful of Kimber’s over the years, built a number of “target” semi-auto’s, and all ended up being ammo specific.
Best average was @2″ at 100y. Thats not single groups, but cumulative. 500-1000 round “groups”.
What I tell most people, is don’t skimp on the barrel.
You can live with a cruddy trigger, it will get better with use, but a bad barrel, you cannot expect anything decent from. You can improve a tolerable barrel, but a bad one isn’t worth the effort.
Hold off on tweaking the stock length until you get some time with it, any, you can work with a short stock but one too long will throw everything off badly.