What Size Scope Rings Do I Actually Need?

Most new shooters and hunters ask themselves the question, ‘what size scope rings do I actually need’, and face problems measuring their scope ring size.

Here I provided a formula to help you determine the ideal ring size for a particular type of rifle.

But the calculated figure will vary a little depending on the types of chassis you measure for.

If hunting at night then consider a nighttime scope.

Q: What size scope rings do I need for my rifle?
A: It depends on your rifle size, model, and some other components.

Standard Evolution chassis – (Real objective diameter)/2 + 0.9 – (action diameter)/2 – base length = Obligated ring height

Evolution HD/Carbon chassis – (Real objective diameter)/2 + 1.05 – (action diameter)/2 – base length = Obligated ring height

* All the units are in inches. The right height is measured from the top of the base to the scope centerline. Slopped bases sum up .035” to highlight every six inches objective prolong from the base.

To make easier the calculation, we are going to put some number to get a result for a particular rifle scope ring.

Also Read: 34mm scope rings to buy

For example, you have an objective lens with 50 mm in diameter. If you convert that into inches, it will come 1.69 inches if you have a rifle with 1.35 inches action diameter. (For example Remington 700 SA).

The scope base is not sloped and has .350 inch height from the bottom of the plate to the plane in-between the risers on the Picatinny rail.

So, our example and the equation demand, we need .855 inches of ring height.

The scope we are talking about has a 30 mm tube. So you need a scope with the same dimension- 30 mm which have 1.18 inches height. The extra lens perfect for the lens cover.

Different types of riflescope rings


Here some different kinds of rifle scope ring that is used with different models for various tasks.

Weaver style rings and bases

Weaver style is the most common types of scope mounting system. In this style, the mounting system uses a 7/8 inch flat, broad base with crosswise recoil slots.

The base’s recoil slots are the exact size to fit Weaver-style rings what have corresponding sized recoil lugs on the bottom of them the two parts of the mounting system fit together like a jigsaw puzzle and prevent any movement from the recoil.

Weaver style base made of aluminum and steel and come with one/two pieces. The scope can be sue with a different gun or remove from gun maintenance to travel. The corresponding recoil lugs and recoil slots on Weaver bases on Weaver rings are .180 Inches wide.

Picatinny /1913 rings and mounts

The Picatinny rings and bases are almost like Weaver style ring and base, but the main difference in them is the width of the recoil lugs on the bottom of them.

These rings are designed and manufactured by the special outlined by USA Navy. Military also use that scopes.

The recoil slots and the recoil lugs are thicker than the Weaver base and rings- .206”wide. Still, Weaver rings are fit in Picatinny bases, but Picatinny rings are not fit Weaver bases.

Leupold Style bases and rings

Leupold style bases are different from the other two above. Different manufacturers make their version of Leopold types of riflescope mount and rings.

The plates of this style come in one or two-piece. These are made of steel, very sleek and robust. These are very reliable and trouble free.

The two halves of Leupold rings are assembled loosely. You will need a scope ring tool/screwdriver handle/one-inch wooden pole to insert between the pieces to gain leverage to turn the ring into the base. You can do that by hand.

Leupold mounting system is not easy to detach like other styles. The top half of the rings need separate to remove it from the scope.

.22 rings,  3/8” dovetail bases, and rings

The dovetail rings are usually used in grooved receivers, and the receivers are found on .22 rifles/airguns. These are consist of cust in the top of the gun and run lengthwise along with the gun.

The cuts in the weapon top are deep enough for a class of dovetail rings to grip firmly on the gun and also a firm connection with claws of a dovetail rings.

A 3/8” base screwed onto the receiver instead of having it grooves cut into it. This type of rings used because the mental on the receiver is not thick enough.

3/8″ dovetail rings come in a variety of sizes which circular diameters to hold a scope with the main tube of 30mm, one inch, 7/8″, 3/4″, or others. Some standard 22 rings can be referred to as a “one-inch tip-off,” a “one inch 22 ring”, or a “one inch 3/8″ dovetail ring.”

The dovetail rings 3/8” come into different sizes. They can circulate diameters to hold the scope with main tubes like 30 mm, 1”, 7/8”, ¾,” etc.

Few standard 22 rings can be referred to as “one-inch tip-off,” “one inch 22 ring”, “one inch 3/8″ dovetail ring,” etc.

Some drove receiver is usable with Weaver-style bases; these are drilled and tapped already. If your rifle has been designed to adopt a broad base, then these rings will get more area to grab.

Extension rings

All different designs you can find in extension rings. It allows you to make a shorter mounting distance between your scope rings. If you want to mount a short scope on a weapon with a longer receiver you may need extension rings.


Now you know all kind of rings for rifle scopes and how to measure the ring also. You should take some time to make study or research to learn about different rings from different manufacturers, their features, price, etc.

If you get a perfect rifle scope with proper mounting system, transport the entire thing on hunt or travel, different swap scopes for different purposes will e lot easier. And the best thing is you would get too loose zero, but still have the best mounting system to use every time.

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