Anyone ever bore sighted @ 1 mile?

NoLimePlease · Oct 26, 2024

Hey guys.
I just got my 20 MOA Spuhr mount on my 50, have a great view across the valley, and figured I'd try using a light ranged at 1760 yards to bore sight my scope. The plan was to zero at one mile (Why not, it's a 50

) and turret down from there. I am assuming I can do this with the 20MOA base but the long range possibilities of this rifle and the corresponding technical needs of distance shooting is a new ballpark for me. Anyone have any experience with these kind of over-inflated ambitions?
Thanks!

bcp · Oct 27, 2024

Bore sighting at 1760 yards will work fine if you have a load that has no drop from line of bore at 1760 yards.

Bruce

ilikegunspdx · Oct 27, 2024

I just usually use the moon.

Nosferatu · Oct 27, 2024

Californians zero on Uranus.

orygun · Oct 27, 2024

I prop my rifle and look thru the bore at a bush on the hillside a little over 800 yards away and set the crosshairs on that.
It's always really close at 100 yards that way.

gmerkt · Oct 27, 2024

These days, I have a hard time seeing a mile away.

bcp · Oct 27, 2024

bcp said:
Bore sighting at 1760 yards will work fine if you have a load that has no drop from line of bore at 1760 yards.

Bruce

Clarification:
Bore sighting works at almost any distance, 25 yards and over. Use whatever is convenient. But don't expect to be on target at long (300+yds) ranges by bore sighting.

Bore sighting aligns the scope and bore, not the scope and your bullet holes.

Bruce

TTSX · Nov 1, 2024

My Barrett M82A1 with a 29" barrel and 20 MOA rail had a zero of 800 yards without adjusting. Since the drop at 1 mile is many, many feet (I don't remember the specific) you will absolutely not even come close to hitting that target if you boresighted to that distance. Not even close to close. You're not shooting a laser, you're firing a heavy, fast, high BC bullet that drops like a rock just like nearly all other bullets once it crosses below the speed of sound. For a .50, that's roughly 1500 yards.