CZ 457 MTR Scope Mounting Questions .....

R

Ridge-Runner

New member
Rating - 0%
0   0   0
Location
Interior BC
Hello

I have several questions and I’m quite new to all this and it seems very confusing for me and I’m finding these forums full of very valuable information, the learning curve is steep for me. First a bit of background, I recently purchased a CZ 457 MTR in 22lr with a heavy barrel. I’m interested in shooting from 25m to possibly 300 meters, but the majority will be 50m to 100m. I have decided to put a Vortex 6x24x50 with adjustable parallax on this gun. I would like to get the scope as close to the barrel as possible and for me determining what rings and rails is very confusing.


First question; what is the difference between a Weaver CZ 457 picatinny rail vs a Weaver CZ 457 picatinny angled 25 MOA rail for my needs? Also, will the rail come with mounting screws? Do you recommend going this way? What is the thickness of a Weaver CZ picatinny rail? Recommendation on ring height (or rings make or models) with a picatinny rail for a Vortex with a 30mm tube and 50mm objective?


Second question; or would you go without the rail and go with something like a Burris Signature that goes directly to the dove tailed receiver? If so, would a Medium or High be best for my needs? And again, recommendation on ring height for a Vortex with a 30mm tube and 50mm objective?


I know this will produce several different views and I’m eager to learn, so please feel free to let me know your feelings or if I’m totally off in my decisions. My budget is about 700 dollars for optics and mounting.


Any help will be appreciated and ultimately, I just want a functional system on my gun to teach me better shooting skills and trigger time at a reasonable cost.

Thanks, and sorry if its long winded ……any parts or pieces of my questions are welcome.

Dave
 
Good morning Dave, I have the same rifle and chose to go with rings that mount directly to the dovetail thereby eliminating the extra interface between the dovetail and the rings, one less thing to come loose. A medium height ring should mount that scope close to the barrel.
Howard
 
Thanks Howard, I like that thought process to keep things simple. I have been digging a little deeper to try and figure this out by looking at rings and objective lense clearance. Here is what i have come up with; not sure if this is right though....

Is my math and reasoning right ?

A Vortex 6x24x50 with a 30mm tube, the objective is 2.52 inches or 64.5 mm. So, the difference between the tube diameter (30mm) and the objective lense diameter (64.5mm) is 34.5mm. The height or difference from the bottom of the tube to the bottom of the objective lense would then be 34.5mm divided in half to equal 17.25 minimum distance or clearance needed for scope barrel clearance.
Therefore, I would need a 19mm / 0.748 inches or greater ring height for scope clearance. So, if I purchased say a Burris Signature with High rings 0.793 inches or 20.14mm this would give me 2.89mm clearance, (20.14mm-17.25mm =2.89mm) or (0.793 inches – 0.679 inches = 0.114 inches) clearance?

Thanks again, Dave
 
Congratulations on your CZ 457. You say you would like to get the scope as close to the barrel as possible. If that is what feels most comfortable when you and the rifle are in shooting position, then go with the lowest rings. If that is not most comfortable, there's nothing wrong with using higher rings. What counts is that the shooter can look through the scope without having to crane his neck, either up or down. This is especially important when shooting from the bench, where a lot of shooters may not use as much "cheek weld" as they do when shooting off hand.

Basically there are two kinds of rails. One is "0 MOA" and that means it is not "angled" to give the scope mounted on it more elevation. An "angled" or canted rail will give added elevation. This may become important when shooting out to longer distances with a .22LR firearm. There are a few manufacturers who currently make rails for the 457. The popular DIP rail adds .280" of height.

Some shooters add a canted rail as a matter of course, while others use the 0 MOA rail, preferring instead to adjust for elevation with their scope adjustments. Some scopes have a considerable elevation range, some less so. If your scope has a lot of elevation you may not need a 25 MOA type of rail. A number of Vortex 6-24 scopes have 65 MOA of elevation, which is as much or more than many other brands.

Burris Signature Zee rings have inserts that can be used to give additional elevation. These are weaver/picatinny style rings that require a base for the CZ 457 in order to mount them.

I've had a number of CZ and other rifles and have always used dovetail rings with great satisfaction.
 
Thanks Grauhanen, I have to say there is a lot to this precision 22lr shooting, my head is whirling. The cheek weld and shoulder pressure is another question i have aswell and i guess i have to figure out my shooting style and what works for me and my gun. So many variables and i have so many questions, Im learning its not a one size fits all.


Thanks so much for your imput and helping me understand.


Dave
 
Ridge-Runner said:
Thanks Grauhanen, I have to say there is a lot to this precision 22lr shooting, my head is whirling. The cheek weld and shoulder pressure is another question i have aswell and i guess i have to figure out my shooting style and what works for me and my gun. So many variables and i have so many questions, Im learning its not a one size fits all.


Thanks so much for your imput and helping me understand.


Dave
Click to expand...

Not allot to add after grauhanen's post...except to say that I think you might have some ground to cover before you can hope for great results at long distances. That's not a criticism btw, it means you have boat loads of fun to have between now and then! For these reasons, I might suggest you leave aside any rails for the moment and get that scope mounted to the rails with standard rings. If it's a 30mm tube, the options are fewer (rings-wise) but if you decide on a 0MOA rail, at least you can use Weaver-style rings. Allot more options with those. The rails add height, so, often choosing one means you go one height lower with the rings. Like buying ice fishing boots large to allow for thicker socks. :)

I sometimes get it wrong btw, thinking MED height rings will work when HIGH are required. lol Some trial and error if you can't find anyone who has mounted the same scope on the same gun. (worth running through Google btw) After that, have fun...starting at about 50 yards...and test as many ammo types as you can off a steady rest. Just did this with my newest CZ not that long ago;

https://www.canadiangunnutz.com/for...eekend-fun-with-the-16-quot-CZ-452-American!-)

It's auditioning for my spring 2020 gopher safari. Might make the cut. :)
 
Ridge-Runner said:
Hello

I have several questions and I’m quite new to all this and it seems very confusing for me and I’m finding these forums full of very valuable information, the learning curve is steep for me. First a bit of background, I recently purchased a CZ 457 MTR in 22lr with a heavy barrel. I’m interested in shooting from 25m to possibly 300 meters, but the majority will be 50m to 100m. I have decided to put a Vortex 6x24x50 with adjustable parallax on this gun. I would like to get the scope as close to the barrel as possible and for me determining what rings and rails is very confusing.


First question; what is the difference between a Weaver CZ 457 picatinny rail vs a Weaver CZ 457 picatinny angled 25 MOA rail for my needs? Also, will the rail come with mounting screws? Do you recommend going this way? What is the thickness of a Weaver CZ picatinny rail? Recommendation on ring height (or rings make or models) with a picatinny rail for a Vortex with a 30mm tube and 50mm objective?


Second question; or would you go without the rail and go with something like a Burris Signature that goes directly to the dove tailed receiver? If so, would a Medium or High be best for my needs? And again, recommendation on ring height for a Vortex with a 30mm tube and 50mm objective?


I know this will produce several different views and I’m eager to learn, so please feel free to let me know your feelings or if I’m totally off in my decisions. My budget is about 700 dollars for optics and mounting.


Any help will be appreciated and ultimately, I just want a functional system on my gun to teach me better shooting skills and trigger time at a reasonable cost.

Thanks, and sorry if its long winded ……any parts or pieces of my questions are welcome.

Dave
Click to expand...

Pictures worth a thousand words...

48009076157_10232ee549_b.jpg


My set up:

- Vortex DB Tactical 6-24x50
- Area 419 30 MOA Base for the CZ457
- Warne LOW Rings #213

Zero at 50 yards with Remington Subsonics, scope has 8 MOA down from Zero and 59 MOA Up from Zero. According to my ballistic app I can reach out to 345 yards not including hold over.

I have a shooting lane out to 280 yards.... I go 41.75 MOA up from zero.

CZ and other companies sell 25 MOA bases for the 457... I say get a 30MOA and be done with it.

Bang.... TINK! Love it!

48009043156_f3a2f03390_b.jpg
 
Wow, that looks awesome !!! Thanks to all that responded, such a fun gun and so many options. I have to say I have learned a lot more and I keep reading and researching.

D
 
I went with the rail that Elwood Epps makes, which is 25 moa, rings are Burris xt (overkill) but have a massive steiner on it that was meant for the creedmoor, the shims do help center but if you have a 25 moa rail there is no advantage other than wind age. I can easily get to 300 m before I run out of dial which is crazy. I find if I take the rings and scope maybe rail and loosely assemble in store place on counter and if objective hits counter it is no good, will not fit
 
You must log in or register to reply here.
Back
Top Bottom