Re: stepping up long range
Many here have tried repeatedly to find factory ammo that's up to the task. But, most have fallen short.
If you're shooting rocks or coyotes and walking you're shots in, that's one thing. But, if you're hunting big game and expect to make a cold bore one-shot kill on an Elk at 800 yards, you really need to work up a quality hand load.
The problem that most run into with factory ammo isn't the accuracy. Many rifles will group sub-MOA @ 100yds with factory rounds. Rather, factory loads often have a large velocity spread which provides inconsistent trajectory at 500+yds.
Additionally, practicing enough to have confidence at those distances burns up a lot of ammo.
After many years of taking a break from handloading, I struggled with these same issues and went through a lot of ammo brands. Plenty of sub-MOA ammo for my 30-06. But, I couldn't get anything that was consistent at 500 yds. So, I strated handloading again with great results.
Nonetheless, loaded ammo has improved over the years and is better than ever. You might try some of the premium brands or semi-custom loads. If they won't group @100yds, then they aren't much good for LRH. But, if they do group @100, you still need to practice well past the distance you intend to shoot at in order to validate your data.
Perhaps you'll have more success with factory ammo than I did? Or, maybe you can find someone that you trust who can do some handloading with/for you?
In any case, it's all very doable with today's repeatble turrets, range finders, and ballistics software and you'll find plenty of help here from lots of great experts. ...including a few who regularly shoot extreme long range... 1500-2500yds.
Welcome to LRH.