Scope ring height for a CZ 457?

The Baron

The Baron

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My CZ 457 American just landed. :cool: I usually use standard rings with 11mm adapters on my rimfires, but the slight overhang interferes with the bolt travel so I’m going to buy proper 11mm rimfire rings. Talleys look like a good option, but they’re only offered in “low” or “high”. I want the scope as low as possible, so can anyone confirm if the 1” Talley low rings will work with a 40mm objective scope? Or, does anyone else have rings they’d recommend for a nice low scope mount on a 457? (I do not want to add a pic rail).
 
I'm not sure about Talley rings (and it looks like they require a talley base to work?), but I had a 44mm objective scope on my 457 with Warne rimfire HIGH rings. This allowed about 1/4" gap between scope and barrel. This was on a varmint barrel, so I would have a little less clearance than your american pencil barrel to start.

These worked perfectly for me until I moved onto a pic rail.

The Warne 721M medium rimfire rings say they will fit a 42mm objective. Canadabrass sells them
 
I used to have a vortex Diamondback HP 4-16x44 mounted on my 457 Canadian. Was perfect with leupold 11mm high rings. Now it wears a vortex 2-7x32 on medium 11mm Burris signature series rings. Can possibly go low with this setup but it fits my cheek weld with this setup well.
 
Lots of conjecture here, but just do the math. Not all 40mm scopes are the same size, and may or may not hang over the barrel at a different area of taper.

It's pretty easy to calculate the minimum ring height required. Worst case, use tall rings you have. Measure your lowest clearence and that gap is how much lower your next set of rings can be.
 
I am not sure that the bolt handle is the same angle or not - but I ran into this issue when attempting to install a Leupold Freedom rimfire scope onto a BRNO No. 1 - front end of scope cleared barrel nicely - however the bolt handle would hit the eye bell of the scope - so is TWO ends to keep in mind when you select ring height.

Is not at all the same situation otherwise - I had found that 16 mm dovetail clamps as made for CZ 527 fit nicely to 16 mm dovetails on BRNO No. 1 once the recoil stud screw was removed. Was QD rings that I wanted, since I thought the iron sights were nice - first attempt was with Warne Maxima #1B1LM rings - "medium height" - bolt handle hit the eye bell - so I used #2B1LM - "high height" - worked fine - adequate clearance at both ends. The Medium height got installed on a CZ 527 Carbine without issue - that allowed me to install a 4X Burris scope.
 
As previously mentioned on another thread, I picked up a set of medium Warne ring for my CZ 457 American and has plenty of clearance for my bolt when cycling round. The scope is the Bushnell Trophy 4-12 x 40 mm and still have around 1/8" clearance between the barrel and the front cap.
 
350tracker said:
As previously mentioned on another thread, I picked up a set of medium Warne ring for my CZ 457 American and has plenty of clearance for my bolt when cycling round. The scope is the Bushnell Trophy 4-12 x 40 mm and still have around 1/8" clearance between the barrel and the front cap.
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I suspect is what we need - specifics about a particular scope mounted on a particular rifle with particular height rings - naming the brands, dimensions, etc. of all involved components - is not just one size fits all - gets very convoluted when you have to order a part and wait for a week or weeks for it to show up in the mail, and then it won't fit for what you want it for.

I found it especially "shocking" to discover that the words "low", "medium" and "high" mean different dimensions when you go from one brand to another - not the same, at all.
 
Yeh, there should be a standard for rings and a standard bell dimension - a mm diff might make or break the fit.
The 457s have a 60* bolt throw so should Not be a prob, but some scopes with Illum are pretty large at the bell back there. The OP needs to have more info for an intelligent answer. My 457 has a 30* A-419 rail so I went as low as Burris XTRs could but still have over 1/4" clearance at the front, even with flip-caps.
 
Your comment "I usually use standard rings with 11mm adapters on my rimfires" does not name the brand.

Leupold Ring Mounts #54234 should work but hey are the high ones.

What type of shooting are you doing that requires " as low as possible"?

In my opinion, getting too low causes undue pressure with a cheek weld. Recoil is not an issue so cheek weld is not an issue.

How much cheek weld is enough . . . with a three days growth of beard that is enough contact.

When you say . . . "the slight overhang interferes with the bolt travel" . . . Pictures would help.

Having owned 452's and 455's the 54234 Ring Mounts gave sufficient clearance that medium mounts did not. I have not seen anyone in my groups with a problem so there is a problem tying to envision the issue.
 
The issue I’ve run into with standard rings (i.e. not rimfire rings for a grooved receiver) is the amount of overhang beyond the rail interferes with the bolt travel if the rear ring is mounted behind the bolt. That’s easily overcome by attaching the rear ring in front of the bolt, but I decided I want nice clean looking rimfire rings for this gun anyway. If I’m going that route, I want the scope mounted as low as possible - because that’s the way I want it. My primary use for this rifle will be squirrel hunting. While cheek weld might not be too important for a plinkster, the experienced hunters know that when squirrels charge it’s no joke, and you better be down tight on the stock and not miss. :eek:

Scope in the pic is a Nikon Prostaff 5 3.5-14x40mm with no name rings I had in the drawer of things that might get used. That setup is fine for ammo testing purposes, but I’ll likely be stealing the Leupold 3-9x33 rimfire scope off my .22WMR for hunting. I did end up buying a set of Talley rimfire rings off the EE that look to be their “low” version. Those may work well, so will report on that somewhere down the road.



 
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Hmm, that's to be expected with a piccy adapter used on a dove tail. I'd just file some clearence into the ring and also move it ahead of the bolt groove.
 
Something about a picture being worth a 1000 words . . . thank you.
Almost any rings will improve the situation short of calling your current set up "MickieDuck".
Taking something out of the scrap pile enforces doing it right the first time.
You are on the right track so keep us informed.
 
The Talley rings are still inbound, but I was in BassPro today with a Christmas gift card in my pocket and picked up a set of Warne 721M rings (medium height rimfire rings). They’re perfect for a 40mm scope.

 
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Al Flaherty`s has Burris Signature Rimfire .22 Rings with Pos-Align Inserts, High, 1" #420556 in stock. Perfect, inserts, clearance, clean & smooth not junky looking, reasonably priced, these are my go to CZ 457 Varmint mounts.
 
Bad Bob said:
Al Flaherty`s has Burris Signature Rimfire .22 Rings with Pos-Align Inserts, High, 1" #420556 in stock. Perfect, inserts, clearance, clean & smooth not junky looking, reasonably priced, these are my go to CZ 457 Varmint mounts.
Click to expand...

An acquaintance is going through similar on a left hand 457 that he recently acquired - turns out that one has 11 mm dovetails - so when you order scope rings, likely want to get those - not the 3/8" size clamps. Was covered in a previous post on CGN how 11 mm and 3/8" dovetails are different - including their side angles. As per various posts on-line - for a time CZ 452 were being sold in North America with either the 3/8" or the 11 mm dovetails - so you had to measure to know for sure. I think ALL CZ 457 are now sold in North America with 11 mm dovetails.
 
Bad Bob said:
Al Flaherty`s has Burris Signature Rimfire .22 Rings with Pos-Align Inserts, High, 1" #420556 in stock. Perfect, inserts, clearance, clean & smooth not junky looking, reasonably priced, these are my go to CZ 457 Varmint mounts.
Click to expand...

To avoid misunderstanding Burris Rimfire rings, which attach to dovetails, don't use the inserts. Burris Signature rings do. The Signature series are available in different configurations, all of them for use with picatinny or weaver bases/rails.
 
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