GDI Scope Mount 25 MOA or 0 MOA??

[Dynamic Response]

Thinking about getting the GDI quick release scope mount for the LMT 308 and NightForce F1. Do you guys think I should get the 0 MOA mount or the 25 MOA mount?

GDI is releasing the 0MOA mount now so there is a 30percent discount on it. So it will cost $350. The 25MOA mount will cost $500 since I missed out on the deal when they released it. I dont mind paying the extra money and doing it right the first time if thats what it takes.

 

[Graham]

Re: GDI Scope Mount 25 MOA or 0 MOA??

You didn't say what rifle it is going on or what scope it is for.

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Graham</div><div class="ubbcode-body">You didn't say what rifle it is going on or what scope it is for.</div></div>

Sure he did. He said it's for mounting a NightForce F1 on is LMT .308. LoL C'mon, Graham, are you gettin' old?

That being said, I believe the 0 MOA mount to be the best option. I had an order for the 25 MOA and decided to switch it to the 0 MOA because:

1.) All of my shots will be taken from 100-700yds.
2.) The NXS has enough elevation (20 MOA) without the need for 25 MOA extra.
3.) This will only be used on my P308 so, again, I haven't a need for 25 MOA.

 

[Graham]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Oops. You're right. Don't know how I missed that.

And yes, I'm getting old.

The F1 has enough elevation for a 0 MOA mount.

 

[JimGnitecki]

Re: GDI Scope Mount 25 MOA or 0 MOA??

The elevation adjsutments needed for longer ranges, using 308, are larger than some people know.

I fed the ballistics for my current handload, which closely mimics the ballistics of Federal Gold medal and Black Hilsl Match (so it's a TYPICAL load, not a slow one)into the "Shooter" app on my iPhone.

With a 100 yard zero, the elvation adjsutments needed, for atmospheric conditions that are typical not abnormal are:

500 yards: 14.1 MOA
700 yards: 25.4 MOA
1000 yards: 48.3 MOA

Some scopes, like the Nightforce F1, probably handle that fine. Others won't.

More importantly, why limit yourself? Going to the 25 MOA base STILL allwos you to zero the rifle at 100 yards, while giving you a lot more upside in case you ever need it.

I myself run a Nightforce 56mm Benchrest model with 1/8 clicks that is limited to 40 MOA internally. I run a 20 degree Larue combination mount that holds the scope, mounts to the Picatinny, and includes quick disconnect that really does return to zero every time. I am able to flip it with only a very minor windage adjustment between my LMT 308 and my TRG 338 Lapua. On both rifles, the 100 yard zero is about 3.5 MOA above "bottom", so I have 36.5 MOA left internally, while having the benefits of 1/8 clicks and 42 power. My 338 Lapua TRG needs under 30 MOA at 1000 yards, so I'm covered there. On the 308, I am good to almost 900 yards without using holdover (I DO have 10 MOA holdover as well in the reticle though), which is more than I will shoot that 16" barreled 308 at when I have the Lapua to use instead.

I can't imagine why I would have gone with a zero MOA when my 20 MOA gives me so much more range if I want it.

I'd say go with the 25 MOA base. That extra $150 is a small price to avoid future "I should haves".

Jim G

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Oh, and I was wrong about the 20 MOA on NightForce NXS optics. I don't know how I came up with that number.

According to the website the NXS F1 provides 110 MOA of elevation travel, which is more than enough for a 1000yd shot.

http://nightforceoptics.com/SCOPES_OVERVIEW/3_5-15x50_F1/3_5-15x50_f1.htmll

 

[tylerw02]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Go 0 MOA if you ever intend to swap around optics, which is the biggest advantage of the QD. I plan to purchase a 0 MOA because I want to use one scope on two or three rifles. Two of the three rifles are bolt actions with 20 MOA bases, while the third will be a flat top.

 

[LoneWolfUSMC]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tylerw02</div><div class="ubbcode-body">I plan to purchase a 0 MOA because I want to use one scope on two or three rifles. Two of the three rifles are bolt actions with 20 MOA bases, while the third will be a flat top. </div></div>

I agree with tyler in HIS circumstance. Very often stacking canted mounts/bases can end up with not enough adjustment to zero.

However if I am swapping optics between gas guns or flat base rifles I prefer a canted mount. It allows me to have more options when really stretching out the system.

Also remember that if you are swapping between a standard bolt and a AR type system, you are going to have problems using the same mount for both. In that case it is usually better to use correct height rings for the bolt gun and put a riser on the gas gun. If you use something like Badger or TPS rings with a large single nut, swapping them is quick and simple with a torque driver such as the Borka Tools item.

 

[JimGnitecki]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tylerw02</div><div class="ubbcode-body">I plan to purchase a 0 MOA because I want to use one scope on two or three rifles. Two of the three rifles are bolt actions with 20 MOA bases, while the third will be a flat top. </div></div>

I agree with tyler in HIS circumstance. Very often stacking canted mounts/bases can end up with not enough adjustment to zero.

However if I am swapping optics between gas guns or flat base rifles I prefer a canted mount. It allows me to have more options when really stretching out the system.

Also remember that if you are swapping between a standard bolt and a AR type system, you are going to have problems using the same mount for both. In that case it is usually better to use correct height rings for the bolt gun and put a riser on the gas gun. If you use something like Badger or TPS rings with a large single nut, swapping them is quick and simple with a torque driver such as the Borka Tools item. </div></div>

The solution I use on both my LMT MWSE (308 semiauto) and my TRG 338 lapua Magnum bolr rifle works great. I have a Larue mount that includes 3 functions in one piece: scope mount, 20 MOA rail, and QD. On the LMT, I have a 5/8 inch high riser with no moa built in, becuase the LMT requires more height for proper eye alignment behind the scope. That 5/8 riser STAYS on the LMT all the time. I simply move the scope assembly from one rifle to the other via the QD feature. Perfect zero ech time on each rifle because the Larue mount is GOOD. No torque wrenches required.

BOTH rifles then zero at 3.5 MOA above the minimum internal scope elevation adjsutment range. Both can reach as far as I can shoot and as far as my local range enables (1000 yrds), with no fuss or tools.

Jim G

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

No offense but I am pretty certain the Larue mount is absolute scheisse compared to the GDI.

 

[LoneWolfUSMC]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Have you used both? Have you tested both? What were your results?

I have a LaRue sitting here in queue for the next RTZ test and a GDI should be inbound soon.

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body">Have you used both? Have you tested both? What were your results?

I have a LaRue sitting here in queue for the next RTZ test and a GDI should be inbound soon.
</div></div>

I have seen and handled a LaRue but no, I don't and will not own anything by LaRue. Oh, and I've also seen how it can marr the shit out of a picatinny rail over a period of time. I could be wrong but...I don't believe GDI would release something like that.

Lookin' forward to seeing your review.

 

[JimGnitecki]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KillShot</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body">Have you used both? Have you tested both? What were your results?

I have a LaRue sitting here in queue for the next RTZ test and a GDI should be inbound soon.
</div></div>

I have seen and handled a LaRue but no, I don't and will not own anything by LaRue. Oh, and I've also seen how it can marr the shit out of a picatinny rail over a period of time. I could be wrong but...I don't believe GDI would release something like that.

Lookin' forward to seeing your review. </div></div>

You ARE wrong. The TWO Larues I have used over the past 2 months (the mount and the riser) have not left a single mark on either of my rifles.

I respect someone having a different opinion, but saying one product is crap simply because you have a different one, and have not even owned the other, is foolish, disrespectful, and not helpful to newbies.

And, not everyone can afford a $500 mount. The Larue, while not "cheap" is a heck of a lot less than that.

A Honda is a lot less expensive than a Lexus. Does that make it crap?

Jim G

 

[pupdawg]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Anyone know the height of the GDI P-ROM mount? I emailed GDI but they didnt get back to me yet.

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JimGnitecki</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KillShot</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body">Have you used both? Have you tested both? What were your results?

I have a LaRue sitting here in queue for the next RTZ test and a GDI should be inbound soon.
</div></div>

I have seen and handled a LaRue but no, I don't and will not own anything by LaRue. Oh, and I've also seen how it can marr the shit out of a picatinny rail over a period of time. I could be wrong but...I don't believe GDI would release something like that.

Lookin' forward to seeing your review. </div></div>

You ARE wrong. The TWO Larues I have used over the past 2 months (the mount and the riser) have not left a single mark on either of my rifles.

I respect someone having a different opinion, but saying one product is crap simply because you have a different one, and have not even owned the other, is foolish, disrespectful, and not helpful to newbies.

And, not everyone can afford a $500 mount. The Larue, while not "cheap" is a heck of a lot less than that.

<span style="font-weight: bold">A Honda is a lot less expensive than a Lexus. Does that make it crap?</span>

Jim G</div></div>

Nope, a Lexus is simply a re-branded Honda. Oh, and I didn't say the LaRue is "crap". I said I'm pretty certain it is scheisse compared to the GDI but whether or not that proves to be true will be seen when LoneWolf conducts his testing.

Oh, and although it hasn't happened to you (yet), it <span style="font-style: italic">has</span> happened to others. I wasn't implying LaRue is junk. At the present time, I use an ADM Recon mount (lower priced than the Larue) and I've never had a complaint with it.

 

[LoneWolfUSMC]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JimGnitecki</div><div class="ubbcode-body">You ARE wrong. The TWO Larues I have used over the past 2 months (the mount and the riser) have not left a single mark on either of my rifles.</div></div>

Jim, unless you are mounting and dismounting your optics daily, two months is hardly enough time to see.

I can tell you absolutely and positively that due to the way the levers cam against the bottom of the rail, they WILL wear the finish over time. There is no way for them NOT to. How fast and how severe is dependant upon the environment you use your rifles in and how often you remove the optic.

On my work M4 it is almost constantly dusty/dirty because it lives in the leaky trunk of a patrol car. Due to the setup I have to pull my CCO to remove the handguard so it gets pulled after every cleaning. This is usually twice a month or so. After six years, I have a nice worn spot on the bottom of the rail. I don't really give a shit about it because the rifle has much worse marks from operational use. However it's not something you can deny. Take a look at any working rifle with a LaRue throw lever mount and I can bet you will see wear marks IF it has been properly adjusted.

 

[KillShot]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: pupdawg</div><div class="ubbcode-body">Anyone know the height of the GDI P-ROM mount? I emailed GDI but they didnt get back to me yet. </div></div>

Yes sir!

As told to me by Kate at GDI, the P-ROM optic centerline axis above rail height is 1.535".
 

 

[JimGnitecki]

Re: GDI Scope Mount 25 MOA or 0 MOA??

My Larue mounts gets put on or taken off at least 4 times per WEEK:

- Take off rifle that was fired last range session
- Put onto different rifle for this next range session
- Take off rifle after range session to clean the rifle
- Put back onto rifle after cleaning

No finish issues so far.

A lot depends too on how tight people adjust the lever nuts. Too loose and the scope moves under recoil of course. But too tight, the mount will attack the finish. I made an effort to set the tension "just right". I suspect that the marring problems that at least SOME of those people you mention have are due to over tightening. The mount does not need to be really tight to hold firmly and consistently.

Jim G

 

[Lowlight]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Answered,

Man that is a lot of rezeroing because at 200 yards I can't get my LT mounts to hold 2 MOA

What distances are you shooting these rifles and are you rezeroing with the first few rounds

Still debating him pointless, he lives in LTs backyard.

 

[pupdawg]

Re: GDI Scope Mount 25 MOA or 0 MOA??

To add to what Lonewolf said above if your larue mount can be removed easily then the throw levers are not adjusted properly.

When adjusted properly it takes a considerable amount of force to unlock the lever.

Of my ARs that wear larue mounts they all have "wear" marks where the lever foot meets the rail. Looks sort of like the anodizing is gone... Which I consider wear.

Lonewolf- you wouldnt happen to know how high the GDI mount is do you?

 

[pupdawg]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Thanks killshot!

 

[Lowlight]

Re: GDI Scope Mount 25 MOA or 0 MOA??

GDI is about 1.5" I believe...

 

[pupdawg]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Got it Frank. Thank you.

 

[LoneWolfUSMC]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JimGnitecki</div><div class="ubbcode-body">A lot depends too on how tight people adjust the lever nuts. Too loose and the scope moves under recoil of course. But too tight, the mount will attack the finish. I made an effort to set the tension "just right". I suspect that the marring problems that at least SOME of those people you mention have are due to over tightening.<span style="font-weight: bold"> The mount does not need to be really tight to hold firmly and consistently.</span></div></div>

Jim, I am not going to debate this past stating these two points.

1. The mount on this particular rifle is tightened exactly as Mark LaRue told me to do it. I can only speak for the tension on mine, but I can tell you that every WORKING rifle I have see with a LaRue mount on it for any length of time has the marks on the bottom of the rail. It's a cosmetic issue only and I could really care less, but that isn't to say it doesn't happen.

2. When lives are on the line, we error on the snug side. A mount coming loose on your range day when you are swapping them around is an inconvenience. My mount coming loose after I have left the last cover and concealment is a little bit bigger problem. As I said, my rifle lives in a car trunk. I don't have the luxury of checking the zero every time I pull it out.

Think critically. There is NO WAY that steel levers can bear against anodized aluminum and not cause wear.

 

[T2CH]

Re: GDI Scope Mount 25 MOA or 0 MOA??

LW, I, like you, have some LT mounts here that I have used and a GDI on the way. I will probably have some opinions to share after I get the GDI.

 

[Dynamic Response]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Hey guys this thread is about which GDI mount is right for my gun. Ive never used Larue mounts but I will tell you this. LMT uses Larue mounts to test the rifles before leaving the factory and they do Scratch up the bottom of the rail. I have a scratch on the bottom of mine from it. I can take a picture if you would like.

Anyways my main reason to get the GDI mount is for quick detach and I want to mount a Mini Red Dot on it. I have a Mount now that is 20MOA and I believe I have about 81MOA left to use. So with out the 20MOA I will have about 61moa left which is enough to get out to 1200 yards. I am new to long range shooting but I do think 1200 yards is pushing it for a 308. I do not plan on putting this scope on any other rifles. If I get another Rifle I will buy a Scope and mount for it.

Also In the future I would like to get one of those night vision devices that mount in the front of the scope. I never used one or really know how they mount up. My question is will a Night Vision device still work if I have a 25 moa mount on the scope or does it have to be perfectly lined up with the night vision?

I understand its always better to have more then needed but I dont want this scope to be to close to the rail that I cant get lens covers on or have any problems with any thing else. I have a 20 MOA mount now and I cant get the NightForce Bikini Cover on my Objective lens because it is to close to the rail. I believe the GDI mount is about .2 higher then my current mount but its also 5 more MOA so I will prob have the same problem which wouldnt be a problem if I can get some other lens covers to fit.

 

[LoneWolfUSMC]

Re: GDI Scope Mount 25 MOA or 0 MOA??

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body"> My question is will a Night Vision device still work if I have a 25 moa mount on the scope or does it have to be perfectly lined up with the night vision?</div></div>

Yes, a PVS-22 or 27 will work fine with a canted mount.

 

[tylerw02]

Re: GDI Scope Mount 25 MOA or 0 MOA??

I own a LaRue mount. I use it with my SPR rifle. That's why I'm looking at the GDI.

 

[Dynamic Response]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Well Im going to order the GDI soon. Im also in the market for a new torque wrench for my rings. These scopes and mounts are to expensive to not do it right. My torque wrench is getting pretty old so figured I would just buy a new one. Can anyone recommend one? Does anyone know what the proper torque setting is for the GDI rings?

 

[Dynamic Response]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Does anyone know what the proper Torque is for the GDI scope ring screws?

 

[JimGnitecki]

Re: GDI Scope Mount 25 MOA or 0 MOA??

You should email or call the manufacturer if their literature that comes with the product does not incldue the troque specs. It normally should.

For what it's worth, 2 different ring sets that I have mounted in the past had included torque specs for the small bolts that secure the ring halves. One called for 18 inch pounds, and the other 20 inch pounds. But, that does not mean that GDI's would necessarily be the same range.

The bolts that mount rings to the rails typically call for much higher torque settings. Again, no assurnace that this is correct for GDI, but often those call for 60 inch pounds or so.

Jim G

 

[Dynamic Response]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Jim I didnt get it yet, Im sure its in the manual. I wanted to order a new torque wrench and my other scope rings are 25in/lbs. So I was hoping the GDI was the same so I could get a pre set torque wrench from Seeknok. That will work for all my other scope rings and my future ones. All my bases are 65 and 68in/lbs. So I just use a 65 from seeknok.

Anybody using the GDI 25moa mount with a 50mm objective lens on a LMT 308? Im curious what the clearance is to the rail.

 

[pupdawg]

Re: GDI Scope Mount 25 MOA or 0 MOA??

You'll have about 3/8" space between the top of the rail and the scopes objective bell. Roughly.

 

[Dynamic Response]

Re: GDI Scope Mount 25 MOA or 0 MOA??

Thanks bro.