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In this video we quickly discuss the reason for a Adjustable Objective/Parallax Adjustment Knob on a Rifle Scope.
This guide will show you everything you need to know about rifle scopes.
?Different types of scope reticles
?A little more (with an exclusive, Bushnell-only bonus section)
If you want to go from rifle scope rookie to rifle scope pro, you’ll love this guide.
Let’s dive in.
Magnification is how much closer the target appears than what is seen with the naked eye.
If a scope’s magnification is 8X that means you can see EIGHT TIMES
closer than the naked eye. But how much magnification do you need?
A LOT of rookies would say, “buy as much magnification as you can”.
That’s not always the case.
In fact, if you buy too much magnification, not only
have you wasted your hard-earned money but you may not even use it.
That’s why I recommend the amount of magnification based on your use.
This should help you out:
For example, if I’m going to hunt varmints and small game with a Savage A17 that’s equipped with a 17 HMR scope, then I’ll probably need some magnification (like 3 - 9x).
Got it? Good.
To find how much magnification a scope has, look at the first number (or range of numbers) before the x.
For example, if a scope says 2×30, that means the magnification is 2x. What if a scope says 3-9×40? That means the magnification is 3-9x.
You might be wondering: what’s the difference between 2x and 3-9x?
Besides the amount of magnification, the main difference between them is the type of magnification. And actually, there are two types of magnification...
Fixed power means that your scope uses only ONE magnification. (Like 2×30).
On the other hand, variable power means that your scope uses MORE than one magnification. (Like 3-9×40.)
But the question is, which one should you use?
From my experience, I’d go with variable powered scopes because it
allows you to shoot in a variety of environments and situations.
But it also depends. If you plan on shooting from only one distance, then opt-in for fixed powered scope. Otherwise, go with a variable powered scope. Once you’ve selected the type of magnification, it’s time to understand…
The objective lens is the lens located at the end of the scope and is responsible for light transmission.
Generally, the bigger the objective lens, the brighter and clearer
your image will be. That being said, should you get a scope that has A
LOT of objective lens? Not really.
Buying a scope that has too much objective lens could be harmful by adding excess weight, requires taller scope rings, and makes your scope more prone to sunlight reflection.
(Which gives off your shooting position).
So, if not a lot, then how much objective lens should you buy?
You can find how much objective lens a scope has by looking at the number after the x.
For example, if a scope says 2×30, that means the scope has a 30mm objective lens. Simple enough, right? So now that you’ve selected the right amount of objective lens, it’s time to discuss...
A lens coat is an invisible coat that reduces glare and enhances the sight.
There are 4 basic lens coating types:
I wouldn’t really worry about lens coating since most scopes today
are fully multi-coated. And even if a scope is just coated, sometimes
that one layer is better than several layers. With that said, I wouldn’t
stress scope coats. Instead, invest in a proper reticle.
Your reticle is the aiming point (or crosshair) you see when you look through the riflescope.
Each reticle specializes in a different use. Here are the 3 most common scope reticles:
That said, a reticle can either be mounted on the front or at the rear of the magnification lens.
There are two different focal planes:
A first focal plane (FFP) is where the reticle’s size ADJUSTS as you change magnifications.
On the contrary, a second focal plane (SFP) reticle’s size remains the SAME regardless of what magnification you use.
If you’re a long-range shooter, go with a FFP reticle. Otherwise, go
with a SFP. And now that you’ve selected your focal plane, the next
thing to understand is…
These are the knobs responsible for your scope’s vertical and horizontal adjustments.
The windage knob (located on the side) adjusts horizontally (left to right), while the elevation knob (located on the top) adjusts vertically (up and down).
When choosing the best scope for your rifle, make sure to get turrets that are reliable and produce a loud ‘click’ sound.
That said, sometimes a scope might have a third knob called parallax adjustment turret which helps eliminate parallax.
“What’s parallax?” I hear you saying. Glad you asked because we’re about to cover it.
This short, 2 minute video will tell you everything you need to know about parallax:
With parallax out of the way, let’s talk measurement systems…
In its simplest form:
Minute of Angle (MOA) is a measurement of accuracy that measures 1”
per 100 yards while milliradian (MRAD) is another measurement of
accuracy that measures 0.36” per 100 yards.
Which one should you use? The straight-up answer:
You see, they’re pretty much the same thing.
Just like how MPH and KM/H are interchangeable, MOA and MRAD are
interchangeable as well. Simply choose one that your hunting buddies use
and you’re golden!
Eye relief is the distance between your eye and the ocular lens.
If you want to save yourself from a bruised eye, I highly recommend
getting adequate eye relief. How much should you get? Well...it depends
on your firearm’s recoil.
The higher the recoil, the more eye relief you’re going to need. Regardless, stick with this range as a minimum: 3 - 4 inches of eye relief.
This will save you from ‘scope bite’.
And that’s all there is to know about riflescopes.
by Bryce Towsley -
Monday, July 10, 2017
reticle is placed in either the first focal plane (FFP) or the second
focal plane (SFP). The main difference between them is that an SFP
reticle will appear to be the same size regardless of magnification.
With an FFP reticle, the size of the reticle will appear to change as
the scope’s magnification is changed.
Most American hunters are familiar with SFP, as that style has
been the most common in American hunting scopes for generations. The FFP
reticle has become very popular with long-range shooters, and as we are
adopting their techniques, this reticle is gaining favor with hunters
wishing to shoot at long range.
With an SFP reticle, the spacing for holdover in the reticle is
only correct at one magnification, usually the highest setting. If the
scope’s magnification is set lower, the size of the reticle relative to
the target changes and the increments of the spacing will change. You
can use a mathematical formula to figure out the spacing for each of the
power settings, but it becomes complicated and confusing and is no good
If you do all your long-range shooting only at the highest
magnification, this is not an issue and an SFP scope will work fine. One
advantage is that you have a strong and easy-to-see reticle even at the
An FFP reticle appears to grow larger or smaller as the scope’s
magnification is increased or decreased, respectively. In reality, the
reticle maintains the same perspective with the target size throughout
the magnification range. That means the holdover points remain the same
throughout the range of magnification. For example, the 6 MOA line is at
6 MOA on the lowest setting, the highest setting and everything in
The downside of an FFP reticle is it appears small and thin at
low power and gets thicker at high power, so it can be hard to see at
the low settings and can cover too much target at the highest setting.
For hunters, the low-magnification setting is often just as important as
the high-magnification setting, so make sure you look at the reticle at
all power settings before buying an FFP scope. Some have illuminated
reticles, which help at low power.
If you use the dial-up technique for long-range shooting both
reticles will work just fine as the dial adjustments are not affected by
the type of reticle.
Recoil Energy Calculator
Use this calculator to calculate the recoil on you rifles, handgun, and
other firearms. After you input the necessary data such as the bullet
weight, bullet velocity, powder charge weight, and the firearm weight it
will output the recoil impulse, recoil velocity, and the recoil energy
of the firearm. With this data you can estimate the felt recoil of a
specific firearm and cartridge. Remember that "felt recoil" may be a
little different from these numbers because felt recoil depends on the
design of the firearm, how you hold it, recoil pads, and other factors.
Use the chart below to see the recoil energy of common cartridges.
Also you may create your own recoil chart and share it with others.