you will find even ones from the same box they may consistently hit to different paces close to the bull but some might be right while others are left and consistently do that. I mark my bolts on the fletching with a sharpie. There may be 2 or 3 that always hit the bull and those are the ones I will use hunting.
At 20 I cannot shoot mine two or more at the same dot. Too expensive.
Good info in my experience!
Bullets I will shoot for groups they are gone after one shot. Arrows and bolts I will shoot to small different targets for each shot, they are reusable and easy to destroy by shooting one with another.
I use one of these
https://www.rinehart3d.com/catalog/18-1-archery-target/ for most of my shooting, plenty of target dots to shoot at that are the same size. Shoot 5 bolts in each of those 5 dots and you can see group patterns well enough IMO and if you can hit each individual dot at ranges 20 to as far as you can shoot With some bolts I and one crossbow I have 70 yards I have and can do that.
IMO if you can keep your shot in that about 2 inch circle out as far as you will shoot be that 20, 30, 40 yards accuracy will not be your issue for not getting your deer or hog with your archery equipment. Within those ranges anyway. Other things like animal moving can sure come into play though which is why 30 yards is as far as I care to shoot a deer with my Bow or crossbow and 20 yards with the recurve. Hogs are a different story, they do not tend to "jump" the string aka react to bow noise causing a miss or bad hit like deer do. I still prefer using a bullet on hogs as I have broken or lost abut half the bolts and arrows shot at hogs.