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Rifle scope alignment


abolter

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I have purchased a tidy second hand nightforce to put atop my RPA. I have it set up and zeroed but have only got 30 clicks windage left one way and 120 the other!!

 

On my first attempt I had no clicks left one way so I switched the mounts 180 degrees and it helped. With no target turrets this is a problem that wouldnt even register as the scope is zeroed and works fine.

 

I would like to get it properly centred, what advice please?

 

they are warne mounts

 

my scope doesnt seem to have the adjustment that the handbook says some have so I cant undo the turret and recentre it, I dont think

 

 

If solution isnt simple any recommendations how to hunt with the wind always on my right???

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Three options: receiver is out of line / scope mounts are out of line / scope is misaligned internally.

 

Personally I'm inclined to think its the warne rings - whilst they are generally ok they are made to a price point and certainly the weakest link in the set up. Buy some decent rings as befits the rifle and scope and see if it improves.

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Here's an idea, mount the scope with just the rear most warne ring - tighten up. Look down the line of the scope - does it look straight? Mount the fronts but dont tighten - do they line up? Do this front and back and see if there is any misalignment and stress on the set up.

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I did try to mount the reverse first and then the front and by eye things didnt look too bad or too stressed but then I have no experience to go on. Normally I mount a scope and zero it and its fine. This has gone the same except now I want it to centre!!

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My personal prefrence are Seekins and Badger (all picatinny). Optilocks are good too.

 

I get your frustration, it might be as well to take to a qualified smith to cast their eye over if nothing is immediately apparent.

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what makes are decent rings??

NF do their own rings and there are various specialist manufacturers. IMO an RPA action should not connect to a NF scope with anything but the best mounts, I certainly wouldn't want to put a good (and expensive) scope into mounts I had not first checked for perfect scope fit and alignment.

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and my point is how do you check for "perfect" fit and alignment? Using what kit etc as "by eye" is not an exact science as I have found out.

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and my point is how do you check for "perfect" fit and alignment? Using what kit etc as "by eye" is not an exact science as I have found out.

The simplest way is a long length of solid bar and the MK1 eyeball looking for run-out along the barrel. But specialist scope alignment tooling is available as are lapping tools if your rings require lapping in

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DITCH the Warne rings,,,,they are without doubt the main problem here,,,been there a few years ago switchin and twitchin ,,,,absolute junk!!! If you have a two piece standard issue RPA bases,,,,ok they should be ok but they can be tempted to screw up a touch out of line,,,,,,,get a decent one piece rail,,,,I use Third eye inclined rails.Get some decent rings,,,again third eye are brill and look nice{or buy one of the sets I have in for sale section!!}

 

Once you have done all this and with a centred scope I bet you wont be more than 5 or 6 moa out on windage at 100 to kick off.

 

Also dont forget if a scope says it has a range of 60 MOA on windage then that means 30moa each way,,,,,,,on the high power NF,s I believe you will have far less than this,,,,sorry haven,nt taken the trouble to look up exact linits to quote here,,,but have a look anyways.

 

Here what I first said DITCH the Warnes,,,,,,,,Regds Onehole.

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I have the one piece rail so I guess rings it is then.

My scope has 60ish clicks each way. Practically checked that

Just looked up NXS specs om windage,,,,,,5.5x22 has total 60moa on windage thats 30moa to play with from a centred scope,,,,loads!! 8x32 has 45,,,,22.5 each wayfrom centre and the biggy 12x42 only 35 and just 17.5 each way,,,,,,,,,,,,,your mounting has to be spot on to have some to spare on this scope.I had a 12x42 when I was struggling with the Warnes,,,,,remember it well ,,,,out in a field all day nearly trying to get a decent zero ,,,I came home the rings didn,t,,,,,,,hope you sort yourself mate,,Onehole.

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Got tps rings on my Rpa and its spot on

Superb ring sets,,,excellent close machining ,,,,gradually moving to Third eye just cos they look good but my last two RPA,s have TPS on,,,,will keep these rings in the cuphoard eventually,,,,they,are keepers,,,,,,,,,,Got mine from Russ Gall years ago on his recommendation.

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  • 2 weeks later...

Superb ring sets,,,excellent close machining ,,,,gradually moving to Third eye just cos they look good but my last two RPA,s have TPS on,,,,will keep these rings in the cuphoard eventually,,,,they,are keepers,,,,,,,,,,Got mine from Russ Gall years ago on his recommendation.

I use stainless tube from a dairy and put that in the mounts which goes the full length of the barrel. I find this works

on windage adjustable mounts to align mounts to barrel, comes in inch and 30mm and they are not to heavey.

atb

barnacle

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I use stainless tube from a dairy and put that in the mounts which goes the full length of the barrel. I find this works

on windage adjustable mounts to align mounts to barrel, comes in inch and 30mm and they are not to heavey.

atb

barnacle

What,s that got to do with TPS ring sets,,? perhaps I have missed the point or am working too many nights,,,,,

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Guys,believe me?? before you bend your Nightforce mate you should not need the help of great lengths of tubing,,,,quality rings on a one piece rail will get you well near to where you want to be.Windage adjustable rings?mounts will force your scope tube out of line ,possible damage to close fitting internals,scope marking etc,,,you may get away with it but am sure 99% on here would not be using these sort of mounts unless they were pretty much set dead centre?

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Went to range today to mount and zero a new to me NXS on my 6BR RPA. My rifle already had a Third Eye 10 moa rail so mounted a set of Third Eye rings,fitted the scope and checked for level then nipped up the screws a little to just hold the scope firm.The scope I had already checked and adjusted for a pretty much well centred setting.Down range 100m in this case was a target board with one piece of A4 card with 4 inchish orange sticker on it.I adjusted my rest so that looking smack down the bore I could see the orange blob in the middle of the bore,,,,,had a quick squint down the scope and main dot in the reticule looked slightly to the right but almost level,,,,,adjusted scope knobs to put dot in centre of paper and on the orange target sticker,,,,checked down the bore again,,,,all looking good.Tightned scope rings a tad more,,,,Fired a shot,,,,landed 4 inches away appx,,,adjusted knobs 3.5 moa on windage and just 2 moa down,,,,,2nd shot,,,zeroed,,,for today anyway.

 

Not a trip down how to zero scope to rifle but if your action and barrel are straight,,,your rail should screw on straight and a good set of rings still keep you pointing in the right direction.

 

I know some rifles might give trouble if factory quality control is poor.I have also had experience with mounts pulling to one side on tightening up,,,,Sako 75,s with their chevron type rails could induce this on the rear base Opilock type mount.Could explain this and cure if someone suffering this problem wants to know.Most scopes may have the capacity to adjust for this potential problem and many owners oblivious to it but I bet there are loads of you out there with cranked over windage,,,,,bet your shots "were" going to the right???

leave that with you cheers onehole.

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