I see that you're already into reloading. That's a big money saver right there.
I'd work at getting the most out of what you have already. For example, I'm not seeing any reference to bedding the action in the present stock.
There is also a mod you can do to the Accutrigger spring that removes a half a loop and rebends the end that sets in and has the locating bend. It's easily done with some needlenose pliers and side cutters. Just google for "accu trigger" or "accutrigger" along with "spring tuning" or "spring mod". You'll get a heap of sites with information out there.
A big factor in rifle accuracy is spacing your shots out so the barrel comes up to a certain temperature and stays there. A lot of barrels will shift the POI as they warm up. So it's important to get them to a given point and hold them there during a string of shots. I've seen match shooters that have to send out a string in a given time use timers to indicate when to shoot so they get the shots spaced out evenly and get all the shots off within the allowed time window.
Loading accurate ammo involves so many factors. For example are you sure that your neck tension on the seated bullets is identical? Or if you're crimping them can you say for sure that your crimps are the same for each round? And if you're loading in little batches are you sure that you are getting properly repeated settings as you switch dies? You don't need to answer any of this but it's worth reviewing your practices and try to identify any weak areas and correct things in some way that makes them consistent and repeatable.
About the only thing I'd suggest you upgrade is your scope and mounts. I used to think that just about any scope was OK. But they most certainly are NOT all made equal. But you don't need to spend the top price either. A good solid middle cost scope by a good maker will prove out to be rugged and have good clarity.
I don't know when you go out to shoot. But if you're testing loads I'd suggest that you want to be testing on days with little to no wind. Anything else becomes a crap shoot or more of a test of your ability to read the wind than of the ammo or rifle. Now reading the wind and compensating is a worthy skill. But it's a terrible time for testing ammo for ultimate consistency and accuracy.
Start keeping notes on each outing. Set yourself up with a way to read the temperature and even air density at your shooting location. For truly accurate long distance shooting this all comes into play for setting up a first shot hit. Anyone can shoot a dozen rounds and walk them onto the target. But the truly amazing shooters will be able to check the temperature and density for the day and read the wind and set the elevation and windage to get a hit or near miss on the first round. Which do you want to be?
From my own bench rest and bipod shooting I'm quickly coming to realize that MOA rested shooting is every bit as much a learned skill as any other skill. Here again consistency is the key to accuracy. And for my own shooting I'm fast learning that the best way to attain that sort of consistency is to not touch the rifle anymore than I have to. I find that it's just way too hard given the variety of club benches I shoot from to get the same sort of hold on the rifle from shot to shot or visit to visit. So the best hold is quickly being found to be NO hold.....
Best of luck, and hopefully you see some improvement from just making what you have as good as it can be.
