In all my years of range duty and even as a lead range officer, one of the greatest sources of evil in the gun world is beginners showing up at Oakdale all hot to trot with incipient "Buck fever" with guns that have been LASER sighted.
There are a couple of big ointments in your fly with this:
1. Even if the bore sighter actually DOES show the axis of the bore out to 100 yards and not just across the room, that has NOTHING to do with the track of the bullet! With any rifled bore, be it right or left hand, the bullet "walks" in the direction of the twist in the rifle. Why??
2. First visualization exercise: Put your rifle on a bench or the hood of a car, and hold a bullet (any caliber, any weight, it doesn't matter) at the muzzle and let it drop. That's how fast the bullet from your rifle drops at x,000 feet per second! No Virginia, just because a bullet is going 3,000 FPS doesn't mean the bullet can "fly".
3. Now while a bullet can't fly, it CAN "walk". Visualize the bullet dropped from the muzzle of your rifle again. It's not spinning, but it IS falling, so there is more air pressure on the UNDER side of the bullet than the TOP side.
4. Now visualize the bullet going 3,000 FPS and spinning clockwise at about 60,000 RPM, which is a typical ballpark number. The air pressure on the bottom of the bullet is higher than the air pressure on the top of the bullet, so that clockwise rotation of the bullet will pull it to the RIGHT. For a counterclockwise rifled bore, the bullet will walk LEFT.
5. AFAIK, most of the problems and head scratching come from the know-it-all whoziss in the gun store doing a crappy job of bore sighting of the rifle. However, there was an account in here of some math "geenious" getting honked off on the "200" range, because he thought it was 200 yards instead of 200 meters, and his calculations didn't agree with what actually happened.
Bottom line, if you think you can calculate the ACTUIAL path of a bullet from your rifle to a target 200 yards away just by figuring the supposed drop of the bullet and the velocity, you are sorely mistaken.
If you want to save yourself some money and not get the green weenie (or Goosed...
) from somebody in a big box gun store, bring the gun to the 50 range, pull the bolt, and sandbag the rifle in place so you can see the target THROUGH the bore. Then put a round in the chamber and shoot it withOUT moving the rifle!!
If you don't hit the paper, go to the 25 yard range.
If you hit the paper, zero the gun in to shoot 1 inch high.
Then take it over to the 100 and repeat.
If you can't shoot a CLEAN 3 inch group at the 100, you have no business going to the 200 [yard] [meter] [fulong per fortnight} range...