Hey KM-93
First things first: Find a *bullet* or 2 or 3 w/a good reputation (eg LilTank's list) and buy a box cartridges of each. Don't blast 'em all in one day, but take your time slowly over a couple of days at the range to see how they perform in *your* gun.
This is because your barrel/chamber will prefer one over all the others - kinda like my kids choosing breakfast cereal - they all do the job, but Cocoa Puffs are my boys 1st choice every time. In factory loads, for some reason i've always had good results from Federal regardless of what i was choosing and for whichever firearm i was using, but YMMV.
It'd be best if you could buy 'em locally. This is for when you find the one brand that really sticks 'em together nice and tight you can go back and buy every box they have with the same (and this is important) *LOT NUMBER*. With the big manufacturers, i think there is less variability so it's not as critical, but still important.
After you've bought 10 or 20 boxes, return to the range and set up groups comprised of 3 or 4 or 5 cartridges and establish your 100 yd "zero". Make sure your windage is dead-center at 100yds so you can next concentrate on your elevation to learn *true* trajectory in *your* rifle and then forget what all the nice, glossy ballistics tables talk about (OK, i'm partially kidding there...). Then shoot at 200, 300, and on out to your *likely* max distance and become profoundly comfortable shooting each distance.
You probably don't do this, (but i initially did!!!), but try getting used to adjusting your optic for distance and not using holdover unless you have mil dots which can be very convenient for this IF you know their corresponding distance ratio's. Otherwise holdover can work but, imho, it's better to know your trajectory and corresponding optical adjustments (given that your optic has a high level of repeatability).
I hope this is helpful, not too much, and certainly *not* condescending - i don't mean it to be!
frank