Rifle Scopes NF problem

[KeithR41]

I was starting my long range dope today. Started at100,200 and 300 were nuts on. 400 was about 1.5moa right and 500 was about 2moa right.

I dialed 2moa left windage on my 3.5-15 NXS and didn't even scratch the target.

I then stepped back to 100 yds, of course my zero is off. By the time I was re-zeroed, I ended up 3moa right from where I started the day.

Is my NF a goner. I checked my knob and it's tight so I don't think it's slipping. Also checked the scope with a level and it's as close as it could possibly be.

Any ideas? I've got the Oregon Sniper comp coming up at the end of May and I don't want to be out a scope for that. I don't know how long NF will take to get my scope back if I have to send it in. Maybe somebody else has a suggestion. I'm gonna run a box drill next weekend too.

Thanks, Keith

 

[BiggerStick47]

Re: NF problem

Did you check your rings/mount?

 

[KeithR41]

Re: NF problem

Yep, all tight. Plus, I'm not getting any shift from shot to shot. Just after dialing windage. I can see where I could have done a retard and dialed in the wrong windage but how do I end up zeroed 3moa off from my zero when I started the day.

 

[KeithR41]

Re: NF problem

There was also 0 (zero) wind today. I was 60deg and georgeous.

 

[rijndael]

Re: NF problem

I'm wondering if you weren't directly centered in the scope and you had an improper parallax adjustment?

Either way, you need to head back out and run a controlled box test.

 

[KeithR41]

Re: NF problem

I'll be running a box drill next week. It still doesn't explain how my zero changed 3moa.

 

[rijndael]

Re: NF problem

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KeithR41</div><div class="ubbcode-body">It still doesn't explain how my zero changed 3moa.</div></div>

So are you saying you're sure that the parallax was correctly adjusted?

 

[KYS]

Re: NF problem

This could be all shooter error as well. Are you shooting off a bag or bipod? Are you stabilizing the rear of the rifle? Id recheck all your gear. make sure you are all at proper torque on everything.

Id go rezero at 100. then walk it out and see how you do. Ive had the same thing happen to me. I shot my 338 off the ground prone and went back 100 yards to shoot off a hay wagon. it was so unstable I missed by inches everytime. then I went back to the ground and hit with every shot. Its all about your base and stability.

good luck with it

 

[KeithR41]

Re: NF problem

Bipod with a pod lock, rear bag, all that good stuff. Shooting to the right is not the problem. I did rezero and now my zero is 3moa from where I started a couple of hours earlier. Don't see how that could be my error. My group was less than half an inch at 100 after I re-zeroed.

 

[KeithR41]

Re: NF problem

Probably not.

 

[chpprguy]

Re: NF problem

May I suggest confriming zero,
run knob 3-4 moa right then back to zero, fire,
3-4 left, then return to zero, fire...
might as well do elevation too..

if it is broke, NF will take care of you, and this would be one of the "few" NF's that did break....

 

[KeithR41]

Re: NF problem

Gonna do that with the box drill next week.

 

[300zero]

Re: NF problem

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYshooter338</div><div class="ubbcode-body">This could be all shooter error as well. Are you shooting off a bag or bipod? Are you stabilizing the rear of the rifle? Id recheck all your gear. make sure you are all at proper torque on everything.

Id go rezero at 100. then walk it out and see how you do. Ive had the same thing happen to me. I shot my 338 off the ground prone and went back 100 yards to shoot off a hay wagon. it was so unstable I missed by inches everytime. then I went back to the ground and hit with every shot. Its all about your base and stability.

good luck with it </div></div> When you going to build a better bench? I almost fell into the hole the last time we shot.

 

[KYS]

Re: NF problem

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 300zero</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KYshooter338</div><div class="ubbcode-body">This could be all shooter error as well. Are you shooting off a bag or bipod? Are you stabilizing the rear of the rifle? Id recheck all your gear. make sure you are all at proper torque on everything.

Id go rezero at 100. then walk it out and see how you do. Ive had the same thing happen to me. I shot my 338 off the ground prone and went back 100 yards to shoot off a hay wagon. it was so unstable I missed by inches everytime. then I went back to the ground and hit with every shot. Its all about your base and stability.

good luck with it </div></div> When you going to build a better bench? I almost fell into the hole the last time we shot. </div></div>

Lose some weight first fatty!!

 

[KeithR41]

Re: NF problem

So, in looking into the parallax idea it occured to me that It probably wasn't set correctly. My NF is clear at almost all ranges regardless of where the parallax is set so I've never really messed with it. I did play with it a little today however, could this have cause a 3moa shift in zero if it wasn't returned to the original setting?

Thanks, Keith

 

[Bradley]

Re: NF problem

Here's you a little info, hope this helps.

http://www.snipercountry.com/Articles/Parallax.asp

Have a good one!

 

[AUJohn]

Re: NF problem

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KeithR41</div><div class="ubbcode-body">I was starting my long range dope today. Started at100,200 and 300 were nuts on. 400 was about 1.5moa right and 500 was about 2moa right.
...
I dialed 2moa left windage on my 3.5-15 NXS and didn't even scratch the target.
...
I then stepped back to 100 yds, of course my zero is off. By the time I was re-zeroed, I ended up 3moa right from where I started the day.
...
Thanks, Keith </div></div>

Sounds like a user issue. IF it was "off" at all but one range I would say you are not mounted in line with the bore.

 

[petesp]

Re: NF problem

I had to send in a NF 5.5-22 NXS the other day. POI was changing, would rezero and would be fine for a few shots an then would change again. Double checked everything for tight and still had problems. swapped scopes and all was fine. Sent it to NF and they said the side focus knob had come loose and was retorqed and everything else checked out fine. Got it back on the rifle and all is well.

 

[KeithR41]

Re: NF problem

How long did it take to get your scope back?

 

[MuleyTime]

Re: NF problem

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: BVEAL</div><div class="ubbcode-body">Here's you a little info, hope this helps.

http://www.snipercountry.com/Articles/Parallax.asp

Have a good one! </div></div>

Nice write up. So, backlash is mentioned in the focus dial which is why you should always start from the infinity end....

Does NightForce have any backlash issues with the focus knobs? I was having a similar problem as described with windage. So, I called NF and they told me that it would be very odd and rare if I had a backlash issue as they have an internal spring that has no memory and therefor no backlash.

However, we were talking about the elevation and windage knobs, not the focus.

So, my question again is: Do the focus knobs on NF have backlash in them or are they built with the same non-memory spring?

Side note...I have never adjusted my parallax like the article mentions....going to now for sure. I also did a box test as well and found the scope tracked very well. Shot prone using bipod and rear bag...

 

[Brians708]

Re: NF problem

I like that!

 

[petesp]

Re: NF problem

It was about 6-7 weeks which was quite disapointing but it was over christmas and the holidays so I figure I had better cut them a little slack.