A good riflescope is essential for many types of competition, and the vast majority of hunters have scoped rifles. Some F-Class and benchrest competitors are now using optics with up to 60X magnification. Over the past 30 years, scopes have continued to evolve with improved glass, more reticle types, vastly increased elevation travel, bigger main tubes, FFP and SFP options, and even built-in electronics.
When shopping for a riflescope, it’s useful to understand how scopes work — how the internal mechanisms control windage and elevation, how parallax controls work, and how magnification levels are controlled.
Basics of How Riflescopes Work
This Burris video (above) covers the key aspects of scope function: zoom magnification, windage control, elevation control, parallax control (front or side mount), and ocular lens focus. There are some tips on getting a new scope running smoothly — it’s wise to rotate the power control a few times as well as both windage and elevation knobs. The video below also explains how to set ocular focus controls optimally.
Scope Break-In Methods and Diagnosing Issues — Great Video
We recommend that all serious shooters watch this video start to finish. A very knowledgeable scope engineer, Leupold’s Mike Baccellieri, explains the fine details of scope operation — with very useful recommendations on how to ready a new scope for use (See 36:50 time-mark). With a new optic he advises to run the controls multiple times to full travel. Also, take your time to get the diopter control just right (See 26:40 time-mark).
The video also explains why, with a new scope or one that hasn’t been used much, it is sometimes effective to rotate the elevation PAST the desired setting then come back a click (See 35:40 time-mark). In addition, near the end of the video, the expert explains how you can use a mirror to determine if the scope mount (base and/or rings) is NOT aligned with the bore axis, forcing excess travel to get on target (See 42:00 time-mark). We have seen this caused by scope rails attached slightly off axis.
Large diameter turrets make windage and elevation markings easier to see, and the click “feel” may be more noticeable given the greater diametrical travel between clicks.
First Focal Plane (FFP) vs. Second Focal Plane (SFP)
The main visual difference between First Focal Plane (FFP) and Second Focal Plane (SFP) scopes is the appearance of the reticle (and its hash marks) at different magnification levels. With a FFP scope, the reticle increases in visible size (and line thickness) with increased magnification. This is so the angular hash marks remain constant (in Mils or MOA angular span) at all magnification levels. So, on a 10-30X FFP scope, a 0.1 Mil hash mark represents the SAME angular measurement at 10X, 20X, or 30X (or any magnification). The downside of the FFP system is that the reticle lines can appear very thick at high magnification. But for a PRS/NRL match, with targets at multiple distances, it is important that the hash marks represent the same angular measurement at all power settings.
On a Second Focal Plane (SFP) scope, by contrast, the reticle lines (and hash marks) appear visually (in thickness) the same at all magnification levels. This means the hash mark divisions will only be precise at one magnification level, as designed by the manufacturer. For example, you could have exact 1 MOA Hash marks at 10X. But zoom the scope to 20X and the same reticle hash mark would then cover 2 MOA. SFP scopes are popular with competition shooters who shoot at specific known distances. Not having thick reticle lines at 25X to 50X is an advantage when aiming at precise benchrest and F-Class targets.
ZEISS now makes excellent FFP Scopes with both MOA and Milrad options
Minute of Angle (MOA) vs. Milliradian (MILRAD or MIL)
This video also explains MOA vs. MRAD (Milliradian) controls. A Minute of Angle (MOA) is an angular measurement that represents 1.047″ at 100 yards. Modern MOA scopes are typically configured with 1/4 MOA or 1/8 MOA clicks. A Milliradian (MRAD) is another angular measurement defined as one-thousandth of a radian. Milrad scopes are commonly configured with 0.1 Milrad clicks. How much is a 0.1 mil at 100 yards? One mil equals 3.6 inches at 100 yards; therefore, 1/10th of that, 0.1 Mil, equals 0.36” – roughly a third of an inch – at 100 yards. That’s pretty close to the common quarter-inch (1/4 MOA) increment found on MOA riflescopes.
Sightron makes excellent high-magnification SFP zoom scopes favored by many competitors. These have proven quite reliable and offer very good performance for the price.
Scope Mounting Method and Alignment
When mounting a scope, you want to make sure the scope is aligned properly, so that vertical travel is precisely up and down, not offset. Begin by supporting the rifle with a good front and rear rest. Use a portable level to ensure the rifle is not tilting slightly left or right around the barrel bore axis. Then you want to align your scope’s vertical axis. For this, we recommend setting up a plumb bob — a weighted line that hangs straight down. This can be set up indoors or outdoors. Align your reticle’s vertical axis precisely with the plumb bob line, making sure not to move the rifle.
One caution — we have seen some riflescopes that are internally off-axis by up to 4 degrees. In this case, you can align the reticle’s vertical axis with the plumb bob line but then find that your turrets are slightly titled. That is a scope manufacturing fault that will result in some error when you input a large click value (e.g. 10+ MOA up or down).
When mounting your scope, a key factor to consider is the eye relief — the distance of the rear “ocular” lens to your eye. When mounting the scope, put your head in the position at which you normally shoot. NOTE: As your optimal head position may be quite a bit different when shooting prone vs. shooting from a bench, you may want to adjust the scope placement for different shooting positions. This Editor had to move his comp rifle scope about an inch rearward when local club matches changed from prone to bench.
Video collection suggested by Boyd Allen
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Many guys getting started in long range shooting are confused about what kind of scope they should buy — specifically whether it should have MIL-based clicks or MOA-based clicks. Before you can make that decision, you need to understand the terminology. This article, with a video by Bryan Litz, explains MILS and MOA so you can choose the right type of scope for your intended application.
You probably know that MOA stands for “Minute of Angle” (or more precisely “minute of arc”), but could you define the terms “Milrad” or “MIL”? In a helpful video, Bryan Litz of Applied Ballitics explains MOA and MILs (short for “milliradians”). Bryan defines those terms and explains how they are used. One MOA is an angular measurement (1/60th of one degree) that subtends 1.047″ at 100 yards. One MIL (i.e. one milliradian) subtends 1/10th meter at 100 meters; that means that 0.1 Mil is one centimeter (1 cm) at 100 meters. Is one angular measurement system better than another? Not necessarily… Bryan explains that Mildot scopes may be handy for ranging, but scopes with MOA-based clicks work just fine for precision work at known distances. Also because one MOA is almost exactly one inch at 100 yards, the MOA system is convenient for expressing a rifle’s accuracy. By common parlance, a “half-MOA” rifle can shoot groups that are 1/2-inch (or smaller) at 100 yards.
What is a “Minute” of Angle?
When talking about angular degrees, a “minute” is simply 1/60th. So a “Minute of Angle” is simply 1/60th of one degree of a central angle, measured either up and down (for elevation) or side to side (for windage). At 100 yards, 1 MOA equals 1.047″ on the target. This is often rounded to one inch for simplicity. Say, for example, you click up 1 MOA (four clicks on a 1/4-MOA scope). That is roughly 1 inch at 100 yards, or roughly 4 inches at 400 yards, since the target area measured by an MOA subtension increases with the distance.
MIL vs. MOA for Target Ranging
MIL or MOA — which angular measuring system is better for target ranging (and hold-offs)? In a recent article on his PrecisionRifleBlog.com website, Cal Zant tackles that question. Analyzing the pros and cons of each, Zant concludes that both systems work well, provided you have compatible click values on your scope. Zant does note that a 1/4 MOA division is “slightly more precise” than 1/10th mil, but that’s really not a big deal: “Technically, 1/4 MOA clicks provide a little finer adjustments than 1/10 MIL. This difference is very slight… it only equates to 0.1″ difference in adjustments at 100 yards or 1″ at 1,000 yards[.]” Zant adds that, in practical terms, both 1/4-MOA clicks and 1/10th-MIL clicks work well in the field: “Most shooters agree that 1/4 MOA or 1/10 MIL are both right around that sweet spot.”
Vortex has released new Viper HD scopes with three magnification levels: 2-10x42mm (two models), 3-15x44mm (three models), and 5-25x50mm (four models). Minimum Advertised Price (MAP) are $599.99 for the 2-10X, $699.99-$749.99 for the 3-15X, and $899.99-$999.99 for the 5-25X optics. Both FFP and SFP options are offered.
This Vortex Product Video (released on 5/9/2024) covers the new Viper HD Scopes. Vortex staffer Jimmy explains the features of the new Viper HD 2-10x42mm SFP, Viper HD 3-15x44mm SFP, and Viper HD 5-25x50mm SFP and FFP hunting riflescopes. These all have 30mm tubes.
Important features for these new Viper HD scopes are:
• HD OPTICAL SYSTEMS ensure superior light transmission and enhanced resolution
• ILLUMINATED RETICLES enhance accuracy and contrast at dawn and dusk
• CAPPED & EXPOSED LOCKING TURRET options safeguard against accidental changes and allow for rapid holdovers and adjustments
• REVSTOP® ZERO SYSTEM (exposed turret models) enables quick and reliable return to zero
The new Viper 2-10x44mm and 3-15x44mm scopes are primarily designed for game hunting. We expect the higher magnification (5-25X) models to be used by varminters and PRS/NRL competitors. The versatile higher magnification Viper HD 5-25×50 comes in four variants: two Second Focal Plane (SFP) models with $1,299.99 MSRP and MAP of $899.99 MAP (Minimum Advertised Price); and two First Focal Plane (FFP) models with $1,399.99 MSRP and $999.99 MAPO. These MAP prices represent a very good value for a quality 5-25x50mm optic with a superb warranty.
To view technical specifications for these new Viper scopes, along with Optics FAQ and high-rez images visit the Vortex New Product Portal.
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Many guys getting started in long range shooting are confused about what kind of scope they should buy — specifically whether it should have MIL-based clicks or MOA-based clicks. Before you can make that decision, you need to understand the terminology. This article, with a video by Bryan Litz, explains MILS and MOA so you can choose the right type of scope for your intended application.
You probably know that MOA stands for “Minute of Angle” (or more precisely “minute of arc”), but could you define the terms “Milrad” or “MIL”? In a helpful video, Bryan Litz of Applied Ballitics explains MOA and MILs (short for “milliradians”). Bryan defines those terms and explains how they are used. One MOA is an angular measurement (1/60th of one degree) that subtends 1.047″ at 100 yards. One MIL (i.e. one milliradian) subtends 1/10th meter at 100 meters; that means that 0.1 Mil is one centimeter (1 cm) at 100 meters. Is one angular measurement system better than another? Not necessarily… Bryan explains that Mildot scopes may be handy for ranging, but scopes with MOA-based clicks work just fine for precision work at known distances. Also because one MOA is almost exactly one inch at 100 yards, the MOA system is convenient for expressing a rifle’s accuracy. By common parlance, a “half-MOA” rifle can shoot groups that are 1/2-inch (or smaller) at 100 yards.
What is a “Minute” of Angle?
When talking about angular degrees, a “minute” is simply 1/60th. So a “Minute of Angle” is simply 1/60th of one degree of a central angle, measured either up and down (for elevation) or side to side (for windage). At 100 yards, 1 MOA equals 1.047″ on the target. This is often rounded to one inch for simplicity. Say, for example, you click up 1 MOA (four clicks on a 1/4-MOA scope). That is roughly 1 inch at 100 yards, or roughly 4 inches at 400 yards, since the target area measured by an MOA subtension increases with the distance.
MIL vs. MOA for Target Ranging
MIL or MOA — which angular measuring system is better for target ranging (and hold-offs)? In a recent article on his PrecisionRifleBlog.com website, Cal Zant tackles that question. Analyzing the pros and cons of each, Zant concludes that both systems work well, provided you have compatible click values on your scope. Zant does note that a 1/4 MOA division is “slightly more precise” than 1/10th mil, but that’s really not a big deal: “Technically, 1/4 MOA clicks provide a little finer adjustments than 1/10 MIL. This difference is very slight… it only equates to 0.1″ difference in adjustments at 100 yards or 1″ at 1,000 yards[.]” Zant adds that, in practical terms, both 1/4-MOA clicks and 1/10th-MIL clicks work well in the field: “Most shooters agree that 1/4 MOA or 1/10 MIL are both right around that sweet spot.”
Many guys getting started in long range shooting are confused about what kind of scope they should buy — specifically whether it should have MIL-based clicks or MOA-based clicks. Before you can make that decision, you need to understand the terminology. This article, with a video by Bryan Litz, explains MILS and MOA so you can choose the right type of scope for your intended application.
You probably know that MOA stands for “Minute of Angle” (or more precisely “minute of arc”), but could you define the terms “Milrad” or “MIL”? In a helpful video, Bryan Litz of Applied Ballitics explains MOA and MILs (short for “milliradians”). Bryan defines those terms and explains how they are used. One MOA is an angular measurement (1/60th of one degree) that subtends 1.047″ at 100 yards. One MIL (i.e. one milliradian) subtends 1/10th meter at 100 meters; that means that 0.1 Mil is one centimeter (1 cm) at 100 meters. Is one angular measurement system better than another? Not necessarily… Bryan explains that Mildot scopes may be handy for ranging, but scopes with MOA-based clicks work just fine for precision work at known distances. Also because one MOA is almost exactly one inch at 100 yards, the MOA system is convenient for expressing a rifle’s accuracy. By common parlance, a “half-MOA” rifle can shoot groups that are 1/2-inch (or smaller) at 100 yards.
What is a “Minute” of Angle?
When talking about angular degrees, a “minute” is simply 1/60th. So a “Minute of Angle” is simply 1/60th of one degree of a central angle, measured either up and down (for elevation) or side to side (for windage). At 100 yards, 1 MOA equals 1.047″ on the target. This is often rounded to one inch for simplicity. Say, for example, you click up 1 MOA (four clicks on a 1/4-MOA scope). That is roughly 1 inch at 100 yards, or roughly 4 inches at 400 yards, since the target area measured by an MOA subtension increases with the distance.
MIL vs. MOA for Target Ranging
MIL or MOA — which angular measuring system is better for target ranging (and hold-offs)? In a recent article on his PrecisionRifleBlog.com website, Cal Zant tackles that question. Analyzing the pros and cons of each, Zant concludes that both systems work well, provided you have compatible click values on your scope. Zant does note that a 1/4 MOA division is “slightly more precise” than 1/10th mil, but that’s really not a big deal: “Technically, 1/4 MOA clicks provide a little finer adjustments than 1/10 MIL. This difference is very slight… it only equates to 0.1″ difference in adjustments at 100 yards or 1″ at 1,000 yards[.]” Zant adds that, in practical terms, both 1/4-MOA clicks and 1/10th-MIL clicks work well in the field: “Most shooters agree that 1/4 MOA or 1/10 MIL are both right around that sweet spot.”
Here’s a good deal if you are looking for a new optic for your hunting or match rifle. For the next month, April 15 through May 15, 2018, Zeiss is running a great promotion on its latest Conquest V4 optics line. The Zeiss annual “Tax Refund Days” promotion cover the entire Conquest V4 family of riflescopes. These are 1-4x24mm, 3-12x56mm, 4-16x44mm, and 6-24×50 models, which range from $799.99 – $1199.99 MSRP. Purchase any of these Conquest V4s and receive a $100.00 immediate in-store accessory credit at time of purchase. Take advantage of this promotion through participating Zeiss Authorized Sports Optics retailers throughout the United States. This applies to online purchases as well — you just apply the $100.00 credit to other products the online seller offers.
“The Conquest V4 riflescopes are getting lots of attention and praise” says Barton Dobbs, Director of Sales for Carl Zeiss SBE, LLC Sports Optics. “We listened to our customers as to what they want and demand from a scope in this price category, and we enjoy hearing how much these customers like the modern features and the high level of performance the V4’s provide.” NOTE: Quantities are limited. To locate a participating retailer, or to find out more about Zeiss products, visit Zeiss Sports Optics.
Positive Feedback from Canadian Customers on Zeiss Conquest V4 Riflescopes Precision Optics, a Canadian scope vendor, says buyers been very pleased with Conquest V4 scopes: “We have placed a LOT of the Conquest V4 and V6 riflescopes recently and can report overwhelmingly positive feedback.”
Accoring to Precision Optics, customers who have field-tested Conquest V4 scopes have consistently reported the following:
The scopes are lighter than expected, considering they have a 30mm tube and are very robust.
The optical performance is outstanding, and compares directly with the Zeiss Victory products, and indeed the Conquest V4/V6 products utilize the same coatings. Users report that … the V4 glass is clearer and brighter than Nightforce SHV/NXS products.
The V4 and V6 turrets track and are repeatable. Customers have run side-by-side tests and report that the V4/V6 scopes track just accurately as a Nightforce NXS[.]
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In our articles collection, you’ll find a story of interest to varminters and game hunters. Choosing And Using Modern Reticles, by author John Barsness, reviews the many “hold-over” reticle options currently available for hunting scopes. The latest “hunting hold-over” reticles, such as Leupold’s Varmint Hunter Reticle, offer both vertical marks (for hold-over) and horizontal bars or dots (for wind compensation). The idea is to allow the shooter to move quickly from one target distance to another, without having to dial elevation changes with his scope turrets. Likewise, the horizontal wind-hold markings give the shooter reference points for winds of specific velocities. That makes the process of “holding-off” for wind much more predictable.
In the Barsness article, which originally appeared in Varmint Hunter Magazine, the author traces the history of ranging/hold-over reticles starting with the Mildot reticle. Barsness explains how to use the mildot reticle, noting how it is best used with a First Focal Plane scope design.
First Focal Plane vs. Second Focal Plane Designs
If nothing else, you’ll want to read this article just to improve your understanding of First Focal Plane (FFP) vs. Second Focal Plane (SFP) optics operation. If you want to use the markings on a reticle to range at various magnification levels, then you want the FFP design, preferred by the military. If, on the other hand, you prefer the viewed appearance of your reticle to stay constant at all power levels, then you’ll probably prefer the SFP design.
Barsness explains how the modern “Christmas Tree” design reticles, such as the Zeiss Rapid Z, evolved, and he explains how to use these reticles to adjust your point of aim for different target distances. These hold-over reticles can be very handy, but you must remember that the yardages which correspond to the stepped vertical markings are determined by the ballistics of your cartridge. Thus, if you change your cartridge, or even change your load significantly, your hold-over yardage values will change. You will then need to field-test to find the actual value of the reticle’s hold-over points.
Even if you are not a hunter, you can benefit from reading the Barsness article. For anyone shopping for a varmint scope, the article is a “must-read”. And Barness clears up some common misconceptions about FFP vs. SFP optics. Barsness also offers good, common-sense advice. We agree with Barsness when he says that some reticle designs have become too complicated. Barsness writes:
These days there are reticles with everything from a few extra dots along the vertical cross hair to reticles that cover the bottom third of the scope’s field of view, providing an aiming point for every blade of grass in North Dakota. Here we run into the basic fact that simpler reticles are easier to use, if not quite so versatile.
Personally, I particularly like simple reticles in shorter-range varmint rifles, whether rimfires or small centerfires such as the 22 Hornet. These aren’t likely to be used at extended ranges, or in any significant amount of wind. Hence, something like the Burris Ballistic Plex reticle provides about all the information we can realistically use — the reason there are Burris Ballistic Plex scopes on most of my rimfire or small centerfire varmint rifles.
In our articles collection, you’ll find a story of interest to varminters and game hunters. 
