My advice for getting dialed in is to aim at the same spot each time, and shoot three times. It doesn't matter where your rounds hit, as long as they are in a tight group.
Then, you can adjust your scope and repeat the process. This will move the entire group where you want it.
Do NOT change your point of aim from shot to shot, in order to "walk" your rounds into the 10-ring. If you do this, you'll be there all day and will have nothing to show for it but targets with holes all over the place.
Also, do NOT mix ammunition when you are doing this. Different ammo shoots differently. If you shoot two different factory-loaded rounds, I can almost guarantee that one set of holes will be higher than the other. It won't change the left-to-right placement, but the elevation of your hits will most certainly change. I am talking about 1 or 2 inches, here.
Once you get "dialed in" you must make a mental note (or better yet, write it down) of what ammunition you used to get there. If your scope has detachable turret knobs, take them off and realign them to "zero". If you have never done this, read the instructions that came with your scope. Once your scope knobs are set to zero, you should be able to fire one round of different ammo and correct for elevation (up or down) with the elevation (top) turret, and be smack dab on target again. After shooting, just reset your elevation turret back to the "zero" mark.