If, after trying several different brands of factory ammo and finding your rifle doesn't like any of them, another option is to find a qualified reloading business (sometimes set up in partnership with a gunsmith) who does custom loading.
For a price (which may seem steep at the outset) they can hopefully come across a combination of projo, powder, primer, case/case trimmed length and loaded OAL, along with identifying how far off the lands your bullet likes for optimum performance in YOUR rifle.
Just understand that the process doesn't happen overnight since you (they?) are working with many variables and must find the combination that gives your rifle that Goldilocks "Just Right" result.
All that said, once there has been found an ideal (for YOUR rifle) combination, ask to get a copy of ALL the "options" used to achieve such goals.
As a reloader will oftentimes tell you, the knowing and the ability to recreate all the variables to give you as near to identical reproductions of subsequent rounds is paramount in allowing future ammo requirements to remain as close to identical as possible.
You probably already are aware that in time the throat of your barrel will gradually wear, throwing another variable into the mix and powder/primer/projo/case components will change somewhat between manufacturers lots of each, so be prepared for some occasional differences in POA/POI over time, too.
As a reloader myself, once I've identified the best (for MY guns) components and assembly data, I make it a point to buy as much powder, primers, bullets, cases as I think reasonable for my foreseeable hunting/shooting requirements.
It isn't a 100% guarantee your gun will continue to give you 1/4" 5-shot groups forever, but it'll be a good start and being able to give your ammo supplier all the data you have for them to use to recreate your ideal combination, as long as they are reputable, you'll have a source of ammo as you need it.
Just be aware that he probably won't be willing to set aside quantity lots of all the above components just for you, so each time you buy more ammo you might not get the same accuracy results.
Which is all the more reason to learn how to reload for yourself and buy the gear to build for your needs.
YOU have 100% control in what goes into each round and YOU are your own Quality Control Staff. Once you are proficient and competent, you'll be MUCH happier with the results.
And while the initial outlay for the equipment and components might seem daunting, consider that you'll be able to amortize the costs over many hundreds of rounds of ammo until the only real cost is the cost of your time to build ammo.
An additional HUGE plus is that you can use the same equipment to reload for any another guns/calibers you own and shoot, too. Just make sure to save your brass and that takes one cost factor out of the equation up to a point. That point being that all cases eventually "wear out" and will need replacing with new stock.
That amounts to even more eventual savings and peace of mind that everything is "Just Right."
Good Luck in your quest.
Overnout
