CZ 457

Do anyone know specifics about CZ's 'accuracy guarantee' on the MTR?
They claim
'15 mm groups at a distance of 50 m'
But I haven't managed to find any info about what ammunition they use, or if there's any form of return policy if your specific rifle doesn't manage that standard... 🤔
I did email CZ-Usa and this was the response.
 

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From being around a few guys at matches with 16.5" bbls, it's obvious that they're quite a bit louder - even with std vel match ammo - than guys with 20"-24" bbls. If yours shoots at least as accurately suppressed as it does w/o the can - and the accuracy is good enough to suit your needs - then I probably wouldn't mess around with a tuner. None of my rifles - including Vudoos & CZ457s with Shilens - shoot quite as good suppressed as they do w/o a suppressor. I've got Pro-X & Harrells tuners on the two Vudoo repeaters that I shoot in matches, and they both have Kriegers that I finished at 21" & 23".
 
Do anyone know specifics about CZ's 'accuracy guarantee' on the MTR?
They claim
'15 mm groups at a distance of 50 m'
But I haven't managed to find any info about what ammunition they use, or if there's any form of return policy if your specific rifle doesn't manage that standard... 🤔
it really just depends on your specific rifle what ammo it will like. I would start with SK Rifle Match due to performance to cost ratio. Mine shoots it lights out to 100, but anything beyond that I’m using other options in matches.
 
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I’m looking at the 457 varmint in the boyds stock barrel options are 16.5 and 24 inches I will be shooting suppressed what’s everyone’s thoughts on what barrel length to go with? I like having long barrels with my 6 mm and magnums etc but not much experience with rimfire
The stock makes an otherwise excellent rifle feel a bit cheap. I have a tacsol aeris on it. It shoots lights out with cci standard velocity. All you hear is the bullet hitting the target. I chose the 24 inch barrel to keep it close in length to my centerfire prs rig.
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What would be a better ammo pick for longer range?
If it shoots tight groups at 100, it should be tight further out...
Not true. I’ve seen plenty of ammo shoot great at 100 and fall apart at 200.

For matches I’m running Lapua Long Range or Eley Match. Practicing with SKRM or SKLR.

RWS R50 has the tightest groups at all distances with my rifle, but it’s been impossible to find all year.
 
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Has anyone else experienced issues running the L3I magazines with their Billet magwell? Both mags are extremely difficult to seat when compared to OEM mags in the same magwell. Im hoping they just need some wear/break in…
 
General wisdom is try a little of everything. 22lr in general is barrel dependent for ammo pickyness.
The price of 22 ammo generally corresponds with its consistency. When 20+ shot groups are used, or are electronically overlaid, the truth comes out. Lot testing is sound, but very few shooters have the skill, equipment, and mental precision to benefit from it, let alone wind free conditions. Lots of internet Rimfire ammo gospel presentations are not statistically sound.
 
Has anyone else experienced issues running the L3I magazines with their Billet magwell? Both mags are extremely difficult to seat when compared to OEM mags in the same magwell. Im hoping they just need some wear/break in…
I seen a video on his page about adjusting the magwell. Go on his YouTube page and check it out
 
Has anyone else experienced issues running the L3I magazines with their Billet magwell? Both mags are extremely difficult to seat when compared to OEM mags in the same magwell. Im hoping they just need some wear/break in…
I installed the billet magwell in my MTR, and the L3I mags fit great. The factory polymer mags are stiff. I did not need to do any adjustments.
 
I target shoot at home . I have 1000 yard range and I will want to stretch the rimfire out a little and being heavier doesn’t bother me . I just didn’t know if barrel length changed velocity like it does with the center fire stuff
Only slightly. The barrel length will effect SD/ES numbers though.. The ARA guys all favor the 24" version for that reason. Benchrest guys favor longer barrels for that reason as well. Lower numbers will help at longer ranges to keep your groups tighter. My 24" At-One shoots as well as my MTR at longer distances.
 

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Picked up a 16.5” MTR, looking for a chassis that’s got adjustable cheek height/lop so the lady can shoot it, and one that would balance the gun for barricade shooting - any recommendations?
 
Picked up a 16.5” MTR, looking for a chassis that’s got adjustable cheek height/lop so the lady can shoot it, and one that would balance the gun for barricade shooting - any recommendations?

It's going to take a lot of weights to make a 16.5 barrel balance for positional shooting off obstacles and barricades.

That being said, I think you're two best options would be the Grey Birch LA chassis or the MDT ACC gen 2. I think those two have the best forend to buttstock weight ratio.

Honestly though, you'll probably end up spending so much money on weights to balance it out, you could probably just buy a heavier barrel. It takes an extra 3-4 lbs in the forend to balance out the 457 with an average weight scope.
 
Picked up a 16.5” MTR, looking for a chassis that’s got adjustable cheek height/lop so the lady can shoot it, and one that would balance the gun for barricade shooting - any recommendations?
I would take a look at the Grey Birch La Chassis 457. It is a light weight chassis that would get you very close to balancing. It is going to be very hard to get any chassis to balance with the 16 inch stock barrel but I would bet this chassis with the 16 inch forearm and a set of mlok external weights and you would be there. This is with a L3i 24' Barrel. Which I fully understand is much heavier, but it also balances way in front of the stop. So, I am sure with the stock 16" and a few external weights it will work or be very close.

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My CZ457 pro 20" likes eley. .113 MOA at 50, and for general plinking, subsonic cci was 1.2 MOA at 100, 2.5 MILS up, 0-10 MPH wind. The factory test target that came with gun was 11mm group at 50M. Factory stock gun except for McRee chassis. I also got a pro varmint 16" threaded barrel one, which also has an 11mm group on factory 50M test target. Put it in a McRee chassis but have not fired it yet.
 

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Been guilty of not shooting the CZ enough since I had it completed late July early August of this year. I needed to zero some rifles this Christmas morning so I took her out. I still plan on getting the ACC Gen 2 for it.
I had one box of Polar Biathlon left over from my Vudoo and surprisingly the CZ shot well with it. Attached are two back to back groups with the Lapua before I moved onto another rifle to square away.

Edit: pics finally added

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Been guilty of not shooting the CZ enough since I had it completed late July early August of this year. I needed to zero some rifles this Christmas morning so I took her out. I still plan on getting the ACC Gen 2 for it.
I had one box of Polar Biathlon left over from my Vudoo and surprisingly the CZ shot well with it. Attached are two back to back groups with the Lapua before I moved onto another rifle to square away.

Edit: pics finally added
Interesting to see you are running an arca rail on the La Chassis. Are you doing that to try to stiffen the forearm up? If so, how is that working? On my wife's build that is my only knock on the La Chassis would be the flex in the forearm. I kind wish they would look at making something like a competition forearm that would have more wall thickness to stiff it up and even a bit wider to give you better stability. However, I do understand to build a chassis that light you have to give something somewhere. I like Grey Birch's modular design because it allows them to create use specific forearms and butt stocks in the future.
 
Interesting to see you are running an arca rail on the La Chassis. Are you doing that to try to stiffen the forearm up? If so, how is that working? On my wife's build that is my only knock on the La Chassis would be the flex in the forearm. I kind wish they would look at making something like a competition forearm that would have more wall thickness to stiff it up and even a bit wider to give you better stability. However, I do understand to build a chassis that light you have to give something somewhere. I like Grey Birch's modular design because it allows them to create use specific forearms and butt stocks in the future.
The GB La Chassis was never intended for a truck axle barrel. The forend is super flexy so the add-on arca rail helps a little but the flex is definitely still there. Honestly it’s place holder right now until I can get off my ass and order the Gen 2 ACC.
 
The GB La Chassis was never intended for a truck axle barrel. The forend is super flexy so the add-on arca rail helps a little but the flex is definitely still there. Honestly it’s place holder right now until I can get off my ass and order the Gen 2 ACC.
There's another CZ comp chassis coming in the next couple weeks.
 
Got the DPG extractors in this afternoon. They were a bitch and a half to install because of the thickness. Get ready for some cussing. You have to work to get the factory spring over the edge of the extractor.
I was having intermittent failure to extract. Not enough to piss me off but it happened on occasion. The points of the new claws are sharp and bolt close is a little firm but hopefully it’ll wear in a bit.
For giggles the factory claw thickness is about 0.074” and the new ones are roughly 0.077”.
I cycled a few rounds and had no issues. The brass has little marks from the claws. Live fire will happen tomorrow.
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PS- yes I need lotion.
 
Did a quick range session this AM to confirm that the “good lot” wasn’t just a fluke yesterday and to check the function of the new extractors.
The stars must have been aligned because I shot probably my tightest group ever. Not shown but the other four 5-shot groups were 0.290”, 0.385”, 0.204”, and 0.260” in no particular order.
The same lot also did really well at 100y again. The reason I wanted to shoot what I had left of the testers to confirm.

As far as the extractor, it worked 100%. Closing the bolt handle is still stiff but it’s not bad. On the OEM extractor I noticed the brass ejecting out to the side in a nice arch. The brass now comes out and down or out and around the 2 o’clock. I know it’s not an AR but just wanted to see how it ejected. I extracted live and fired Lapua no problems.

Pictures from today and video of the bolt function and ejection.


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Cool! Are the extractors hitting the relief grooves in the barrel and being forced outward on bolt close? DPG might have different dimension grooves than on your barrel (looks like MCR?).
 
The two CZ's I've had extraction issues with have had aftermarket barrels. Swapping extractors fixed one of them. The other (Lilja) is beyond help to get it 100% it would seem.

I do have a good friend who is competent that has a factory CZ that cannot extract/eject reliably.

The vast majority of CZ's are fine out of the box, but no product is ever 100%. There is a need for replacements since CZ supply chain cannot seem to keep up.
 
Just received my CZ 457 with 20" MTR barrel. I am going to install a Area 419 Arca rail and 30 MOA scope rail.
topped with a Athlon Helos BTR gen2 6-24x56. It has a beautiful walnut stock but I'm thinking getting a WOOX Furiosa stock.
Can't wait to try it out.
 
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Just received my CZ 457 with 20" MTR barrel. I am going to install a Area 419 Arca rail and 30 MOA scope rail.
topped with a Athlon Helos BTR gen2 6-24x56. It has a beautiful walnut stock but I'm thinking getting a WOOX Furiosa stock.
Can't wait to try it out.
I have a Tikka T1X in a woox Furiosa and a cz 457 varmint mtr. Both get shot in PRS rimfire, cz is base class and the Tikka is open. If you plan on shooting PRS or NRL22 with it make sure you get the Furiosa ultra forend as the regular Furiosa forend gets pretty tall when you have an arca rail stuck under it which makes it harder to thread into and out of barricades. Also the longer length from the ultra forend will help with balance, I do like the regular Furiosa grip a lot but haven't held the ultra grip.

Fwiw I'm going to take my Tikka in a different direction and make it light by swapping a grey birch la chassis with a 16" handguard and I'm considering a carbon barrel and going with a lighter scope also.

I did extend my CZ forend because the foundation universal arca rail was much longer than the stock and I had issues snagging it on barricades a couple times so this will hopefully make it a little less likely to get hung up on goofy barricades. (It's mounted to the rail only so technically it isn't a stock modification, just a rail mounted weight)
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I have a Tikka T1X in a woox Furiosa and a cz 457 varmint mtr. Both get shot in PRS rimfire, cz is base class and the Tikka is open. If you plan on shooting PRS or NRL22 with it make sure you get the Furiosa ultra forend as the regular Furiosa forend gets pretty tall when you have an arca rail stuck under it which makes it harder to thread into and out of barricades. Also the longer length from the ultra forend will help with balance, I do like the regular Furiosa grip a lot but haven't held the ultra grip.

Fwiw I'm going to take my Tikka in a different direction and make it light by swapping a grey birch la chassis with a 16" handguard and I'm considering a carbon barrel and going with a lighter scope also.

I did extend my CZ forend because the foundation universal arca rail was much longer than the stock and I had issues snagging it on barricades a couple times so this will hopefully make it a little less likely to get hung up on goofy barricades. (It's mounted to the rail only so technically it isn't a stock modification, just a rail mounted weight)View attachment 8592551
Sweet!! I'm going to call Wooks to see if the can make the ultra for a 457
 
I’m sure a few of us caught wind of it a while ago but had to stay tight lipped myself included. Well it’s official now.