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Bore Sighting a long range rifle

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#1
Kevinjs1

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I want to put a new scope on my .260. I will be shooting from 100 yards to 1000 yards. What do I need to bore sight it or should I just take it to a gunsmith to have this done?

#2
TCB Firearms

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1-Set rifle in a bench vise
2-Remove Bolt
3-look down bore from bolt location until your target is centered in the bore
4-Adjust scope to match bore
5-verify/repeat as needed
fire 3 shots, adjust as needed

EDIT to add
I do this at 25yrds, then adjust scope dope to where i want my zero. For the range you listed i would zero at 300-400 yrds and dope card up and down in 50 yrd incriments

Edited by TCB Firearms, 19 October 2011 - 01:43 PM.

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#3
rizzo

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Jason laid it out perfectly. Forget lasers and all that nonsense, this is how Dad taught me to do it, and he knew a thing or two about sighting in a rifle.

Edited by rizzo, 19 October 2011 - 04:28 PM.


#4
Kevinjs1

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That is awesome fellas, thanks. I just need a bench vise now. It will be a much more useful tool than a single purpose pen laser!

#5
unforgiven5150

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That is awesome fellas, thanks. I just need a bench vise now. It will be a much more useful tool than a single purpose pen laser!

I have one. It's not one you can shoot from, but it will work to bench sight it. You're welcome to borrow it whenever you need.

#6
rizzo

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I don't use a bench vise most of the time. Pack your rifle between a couple of range bags or something similar, use a couple of sandbags to get your barrel where you want it, and use a small level on the top of the scope to make sure you rifle is level, then proceed with the bore sight. There are perfect ways to do things, and then there's "how I do it most of the time" ways.

#7
MOUNTAIN WILLIAM

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Here are some tips from Leupold, I like the mirror technique to ensure a proper staring point. And yes, according to them, all of my mounting screws are severly overtorqued.
http://www.leupold.c...your-riflescope

#8
Kevinjs1

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Here are some tips from Leupold, I like the mirror technique to ensure a proper staring point. And yes, according to them, all of my mounting screws are severly overtorqued.
http://www.leupold.c...your-riflescope


Very cool. Never new that about the mirror. Thanks

#9
Longhair1957

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I generally do as Jason TCB said..... I have done it for many years.....usually so close I only have to move the crosshairs a little once firing live rounds.... When I use my laser is if I am boresighting something that has a closed rear reciever.

#10
Dogslayer

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The method I use after mounting a scope is put a target at 25 yards, shoot once,
then make 4x the amount of correction that the scope has at 100 yards.
Most scopes have 1 inch at 100 yards per number on the turrets.
Then shoot again, make any small adjustments, fire again and you should
be on paper at 100.

Dogslayer

#11
Flash

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Do as the others have stated above, then to make it a one-shot adjustment, take one shot at the center of the bullseye. Then put the rifle in a bench vise or anything that holds it securely and with the crosshairs pointing at the center of the bullseye, turn the elevation and windage knobs until the crosshairs rest on the bullet hole in the paper, all without disturbing the position of the rifle.

The next shot you'll be just about dead on.

Flash

#12
markm

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Didn't Leupold have that thingy that magnetically stuck to the end of the barrel and bore sighted your scope pretty accurately?

I remember seeing it in precision rifle class years ago.

#13
TheSaint

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Sure, for $75:

http://www.brownells...tic-Boresighter

I'm with Glen, just rest it on a pillow or two, pull the bolt, center the crosshairs the same as the bore, you'll get it on paper at 100 yards.

#14
markm

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Yeah. That's how I've done the last dozen scopes.. sand bag the gun... The Leupold gizmo isn't reviewed very well either.

#15
Flash

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While I've sighted in a lot of rifles over the years using what Jason mentioned, less the additional shots, just one more usually, around 10 years ago a company named Site Lite came up with a bore sighter and target that you could use from within your house as long as you had 25 feet of distance within the house. It was the world's first (I think) laser diode boresighter and used a HeNe laser.

I bought one cheap right after they first came out and have now set up around a dozen rifles with it and I'm happy as I can even do this during extreme winds or rain as it's indoors. When I get to the range, I go to the 100 yard line and fire one shot into the berm as a fouling shot and 1 at the target. As long as I called the shot good, I then do the routine I mentioned above for the second shot and I'm either on or within 1 more shot of being on at that point. The bore sighter always puts me on target at 100 yards and usually I'm within 6 inches or less of where I want to be, so the bore sighters work well if you've got one or access to one.

Flash





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