Setting up a lazer.

[rongarrett]

Going to use my mp 15 sport for hunting. It will be scoped . I will also use a lazer for night time hog and coyote most shots will be under a hundred yards.hunting. Question: I think I am going to mount the laser atop my scope. What distance should I sight the lazer in for? It is elevation and windage adjustable. Will the lazer follow my crosshairs on the scope when shooting different distances?

 

[ChattanoogaPhil]

Going to use my mp 15 sport for hunting. It will be scoped . I will also use a lazer for night time hog and coyote most shots will be under a hundred yards.hunting. Question: I think I am going to mount the laser atop my scope. What distance should I sight the lazer in for? It is elevation and windage adjustable. Will the lazer follow my crosshairs on the scope when shooting different distances?

The only way the optic and laser would have the identical line of sight is if they were mounted in the identical position on the rifle which unless the laser is mounted inside the scope then that's not going to happen. They will both intersect at the same identical point at a specific distance, but the further up, down, left or right the laser is away from the scope then the more difference in line of sight.

It goes something like this... Mount the laser directly above the scope by 1in and to the right 1in. Put the crosshairs on a target 50yds away and adjust the laser to the middle of the crosshair. Then put the crosshairs on a target 100yds away. The laser will now be 1in low and 1in left of the crosshairs. At 150yds the laser would be 2in low and 2in left... and another inch for every additional 50yds. If you started out at 25yds then the same 1in shift would apply for every 25yds. If you started out at 100yds then it would only be 1in shift for every 100yds... and the laser would be .5in high and .5in right of the crosshair at 50yds. I think...

Bullet trajectory that GM is speaking of below is different than comparing the line of sight with two different sighting devices.

 

[gm272gs]

...Will the lazer follow my crosshairs on the scope when shooting different distances?

No. Your laser will need to be set at a specific distance, just as your scope has been previously "zeroed". If you want to adjust your laser to coincide with point of impact at 100 meters, you'll need to set it for that distance with your elevation and windage adjustments on the laser.

Now, if you set your laser (and/or scope) to point of impact at 25 meters (for a "standard" 55-grain .223 Remington round) then they will be both set to point of impact for 300 meters, as well. If you set up this way, your point of impact at 100 meters (if you put your crosshairs on the target) will be high, by about 1.25 inches.

25 meters = 300 meters (the bullet trajectory rises after 25 meters and drops to the same elevation by the time it gets out to 300 meters).

I like the 25/300 setup myself. I know that at 100 meters, I just have to turn my elevation down a couple of clicks (to compensate for the 1-1/2" it will be high). After I'm done, I just return the elevation knob to zero.

 

[Argonnakid]

The Laser should be thought of as a quick guide. Not a be all to end all. With laser's, most are used for up close, fast target acquisition. Thats why you see them mostly on self-defense firearms. You have to remember that the laser is going to be a straight line from point A to point B, the bullet does not travel a straight line. POI or point of impact, changes with the distance from the muzzle. That's why a lot of scopes designed for hunting have the dots or lines or whatever to help with judging distance, so you can have the right amount of hold-over. Because of this, it is important to know the distance your scope is sighted in for. If you want to use a laser for hunting, it's the same thing. Know the distance you have zero'd the laser for. And keep in mind that you want to keep that laser in line with the bore as much as you can vertical. That way you don't have to figure in windage as much as if you mounted it to one side or the other.

 

[Argonnakid]

I have got to stop answering the phone when typing out a post. What those guys said.

 

[rongarrett]

lazer

Thanks guys !