Large calibre scope survey

wadcutter

wadcutter

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Dec 23, 2008
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www.austargets.com
#1
I was wondering what the actual make and scope power range is that everyone is running on their various large calibre rifles rifles for shooting beyond 1000 yards.
i.e. .375 Cheytac, 408 Cheytac etc.

I have tried running a 8-32x56 NXS on my .375 Cheytac but with the 40moa rail and 15 moa canted Barrett rings I have to sight the rifle in for 800 odd yards. With the same rail and ring set up using a 5.5-22x56 NXS I can get from 100 yards with over 90 moa of elevation left on the turret. I did however like the magnification of the 32 power NXS.
 
#2
It's less about magnification and more about available elevation. I'm running an S&B 5-25x on a 40MOA mount with a 100 yard zero I can still get to 2000 yards with dialed elevation.
 
#3
I run a 60moa base on my 408 with a Premier 5-25 (H-37) and that setup will get me to about 3000yds. My 338 has a 60moa base and a Nightforce 5.5-22 (NP-R1) and that will get me to about 2600yds. I bottom out the elevation on the scope and that puts my zero around 800yds or so. That way I have all the elevation in the turret plus reticle.
 
#9
I have a DTA SRS. I put a Kahles 6-24i on it in a spuhr 44MOA
mount. With a 450yard zero for the .338 Lapua I am .4 mils from the very bottom giving me roughly 90moa or 26 mils to dial in. I also use a .308 conversion for this platform and the mil 6 reticle has hold under for .5 and 1 mil. With the 1mil hold under crosshair it is a perfect 100 yard zero for the .308. I got pretty lucky. The objective is about 2mm from the rail. Below is an image of the mil 6 reticle.
 

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#11
I use 8-32 NXS on both 408CT and 338LM. 40 moa base on 408 . I had a 20 moa base on the 338 but could not reach a mile so I got a 45 moa base . 1750 yd. is my current max. range. Love the glass. NXS is a very good value.
 
#12
Seems like with scopes everything is a trade off.

If you get the magnification, you usually give up verticle come up.

I did something different on my 375CT... I'm running a U.S. Optics SN-9 10-42x80mm

I have a 34moa rail and, I'll never run out of verticle since they are external turrets.
 
#13
Dogtown said:
SN-9 production has been discontinued again, though you can sometimes find them available used.
Click to expand...

Yeah, that's what I did... found one on consignment. I'm pretty happy with it. You certainly can see with it but, it's heavy. I guess that's the trade off with that scope. 4.5lbs in a scope is heavy.... and quite large with an 80mm objective....

But, if you're using the thing as artillary, it's hard to beat. lol
 
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#14
Hi All , I have two Leupold MK4's which were boosted by Premier from Fixed 16x's to 24x's with 65 moa rails that i use on a 6.5mm WSM & 7x68 Improved . The 7mm used 130 moa to get out to 2,624 yards . Leupold state 140 & 45 moa on the scope but mine both seem to have more , I can get 54-55 moa on windage and approx 147 moa on elevation .
I also use a 5.5-22x50mm NXS on a 22-243 Middlestead with a 40 moa rail giving me 94 moa . Used 71 moa to 1,835 yards .

Regards

Greg
 
#15
On my .338 I use a 6-24 Sightron with a 30MOA rail, gets me out to 2000 no problems. On my .50 I've put a 3.5-15 Nightforce although at the moment it's just sitting on a 20MOA rail it still dials out to 2000 yards. I just need to add a further 20MOA mount. The magnification is more than adiquate.
 
#16
I have a Sightron SIII 6x24x 50 on my 338 EDGE IMP with a 40 MOA base
And 20 MOA ring shims.

Then on my 338 Allen Mag sits an NXS 5x22.5x56 with a 45 MOA base.
 
#17
I went at it differently. My scope is a NF BR 8-32 NPR1 1/8 moa clicks that has 50moa total elevation built in. The best place to use your scope is in the middle of the elevation the best you can. SO loving this BR scope and it's 1/8 clicks etc. I went with the adjustable scope ring set from Iveyshooting.com . Very high quality and with the 150min of adjustable elevation using 1min clicks I zero at 100 and can go out till my 230 Hybred doing 3100+ out of the 300 Lapua runs completely out of gas. The whole time staying in the middle of my scope and being able to fine tune with the 1/8min built in. At $525. they may not be for everybody but weighing the $525. against the $2200+ for the ATACR with 120moa+ cranked all the way the ring set looked to be good for my needs. Like I said...Not for everybody. But an option non the less......
 
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#18
To figure out the usable range take the vertical travel of the scope and divide by 2; add 5.8 MILS for the additional travel afforded by the 20 MOA base, and it will give you the amount of usable travel for a given scope/base combo.

So for a Vortex 5-20 HD:

Total vertical adjustment: 36 MRADs / 2 = 18 MRADs

Add the Scope base, in that example it's 20 MOA: 5.8 MRADs

Total vertical is: 23.8 MRADs

Then use your ballistic calculator (here is a free one: JBM - Calculations - Trajectory) to determine how much adjustment is needed to reach your desired max range.\

The down side is the image quality/fov degrades as the internal adjustment approaches the max (in either direction). My personal feelings are it is more important to have the internal adjustment bottomed out at the zero, and have the scope closer to the center of the adjustment at range, and hence the clearer image at the distance; Rather than the other way around. I feel it is more important to have the highest quality image the further out, than close in.
 
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#19
Dogtown said:
It's less about magnification and more about available elevation. I'm running an S&B 5-25x on a 40MOA mount with a 100 yard zero I can still get to 2000 yards with dialed elevation.
Click to expand...

Yep, I ran a thread on here and this is where it went. I was looking for a long range scope, high mag, lots of elevation... Looks like the SN-9 is about it, but it has it's own problems (external adj., NARROW field of view). Same with the March. Both were FFP though.

In the end, I put my name on a list for the Nightforce Beast, still waiting. Looks like that one will have the most elevation out of any of the FFP scopes out there in the 5-20x-ish range.
 
#21
Just put a Bushnell XRS on a custom .300 win mag with a 20 moa badger ordinance rail. From a 100 yard zero I've got 22.3 mils left. Will get me out to about 1950 yards with the 230 bergers. Plus another 6 mils hold over at 30 power.
 
#23
Caught this thread a bit late; using Badger rail 35 MOA and S&B 5-25x56 PMII. It took my .308 at a mile, I expect it to take the .338LM far enough (both Sako TRG). Near Manufacturing also makes 45 and...75 MOA rails.
Good luck and good shooting.
 
#24
Like AIMSMALL55 I have a .300 Win mag with 230 gr. Berger Hybrid Tactical pills.

My Bushnell ERS 3.5 - 21 X50 with H-59 reticle and a La Rue 20 moa rail. I have had no problem running out of adjustment at 1,500 meters, my max distance so far. I zero stopped it at 200 meters so I'll have to figure out how much vetical I have remaining.
 
#25
Like Aimsmall55 I'm using 230 gr. Bergers in my .300 Win mag HS Precison rifle.

With a Bushnell ERS 3.5 - 21 X 50mm W/ H-59 reticle on a LaRue 20 moa rail I have not run out of adjustment at 1,500 meters, my max so far. I zero stopped it at 200 meters so I'll have to go back and see how many mils I have left.
 
#26
I have a NF NXS 5.5-22x50mm Zero Stop on my 110 BA .338 LM. I replaced the factory rail that had a 20 MOA cant with a Murphy Precision
Titanium rail with a 40 MOA cant. I now have 93.5 MOA elevation on my turret. I've shot out to 2300 yds. with it. Key is having enough
elevation for ELR distances. Truthfully, I very rarely exceed 19X power due to the mirage that starts to creep in when maxed out.

For my new SAC .338 LM, I'm mounting a Nightforce ATACR. 5-25x56mm. I had Cameron Murphy fabricate a titanium rail with a 45 MOA cant to fit on the Defiance Machine action. Should give me a bit more elevation than before.

Good luck on your decision.
 
#27
Premier 5-25x56 in LaRue LT158 mount + canted base (total of 40moa) on a .308Win (OA10) allows me to dial-in up to 1,200 meters and hold-over up to 1,500 meters (using the hashmark all the way down on the stadia line)

S&B 5-25x56 in A.I. 28moa cant mount on 20moa built-in base (110 BA) on a .338LM allowed me to dial-in 2,300 meters and holdover up to 2,500 meters.

March FX 5-40x56 in zero-cant mount on 30moa built-in base (AX338) on a .338LM allows me to dial-in 1,500 meters and holdover up to 1,700 meters.

All three of these are zeroed for 100m.

Good luck and shoot safe!


Gun_Slinger
 
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