Scope issue

W

Wendyj

New member
I recently changed a Vortex Crossfire Ii from a 7 mag to a 300 wsm. I bore sighted both and the 7 mag had to move the turrets 2 clicks and I was on. I was running out of elevation when I bore sighted the Vortex on the crossfire. Only had 39 clicks left. Got to the range and at 25 yards I was 2 feet high and wind age was off the paper. Got the elevation down and was 2 feet to the right with no more clicks at all. Run out of ammo before I could do any more shooting. Got it back home and put bore sighted back on it and I'm over the top of the bore site grid. I was all the way off the grid to the right and readjusted that. Went ahead and put a laser boresighter in it and went outside at 50 yards and was nearly on. Is this issue because of the large objective and tall rings. I e always mounted my own and bore sighted and the scope is good and tight. I had it on the 7 mag on a 30 moa Nightforce base and moved it over to the Savage with a 10 moa base. Have never ran out of wind age before or had elevation off the grid of a bushnell bore sighter. It's a v plex reticle but has cross hairs around it to get it close or so I thought.
 
You really can not pay elevation on a traditional bore sighter much attention. It depends on mounting height. Windage should be pretty close to accurate. Sounds like you have an issue somewhere in your mounts.
 
"Is this issue because of the large objective and tall rings.(?)"

A resounding YES. Older grid type bore sighters don't work with scope center lines above a certain height. If this were my set-up, I'd pull the scope and rings and do some swapping of ring orientation to determine if the problem may be misaligned rings.
 
Forget the bore sight. Take it to the range, pull the bolt and use the old look down the bore and move the scope orientation.
 
I'll go with what SaltyDog said and then add one more thing. Bring a portable cleaning vice or some other similar mechanism to the range and learn the 2-shot method. You shoot once, then put the rifle in the vice/cradle/etc. and line up the rifle to where the crosshairs are on target. Then, without moving the rifle, screw the sight adjustments to where the reticles now cover the bullet hole.
 
Agree with saltydog and Doyle. Often do it their way. Matter of fact, changed a couple of scopes around on two rifles and used this method at range to zero the scopes.

Often try the two shot method suggested by Doyle, but do it with rifle in my benchrest and rear bag. Hardly a problem with elevation adjustment, but have a problem holding rifle steady enough to do a decent adjustment with the windage......generally just calculate the number of clicks I need to change the windage adjustment.
 
Saltydog I'm waiting on a New scope to put on here and am going with a 40 mm objective and a Nightforce 20 moa base. I did get it on paper today. I put a target inside the house at 25 yards and locked it in a vice and used the bore. I went to indoor range and was about 6 inches high and set it 2 inches low. Came back home and put the bore sighter on it and it's showing about a foot over top of the grid. Remeasure bore to center of scope and it's sitting 2.10 inches. I'm guessing the bore sighter can't compensate for that. Just my guess anyway. I we Midway put those SHV ffp scopes in the magazine they sent me yesterday. Hopefully next purchase.
 
Wendy, you can not use the type boresighter you are using to set elevation. I have always wondered why they even put elevation marks on the grid.
 
As long as its a bolt action, I boresite the scope to a target on the 100 yd line.

I can bring back to 50 or 75 or I can shoot a larger target at 100 yds.

So far always on the paper.

Makes it pretty simple.
 
Check Europtik for the SHV F1 too. Midway seems to be high on optics a lot. EO is $1,250 for that scope. Saw where Cabelas was $1,299. Plus Midway charges a premium usually on shipping. EO is free and there in 2 days.
 
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