CZ 457

[Merlin O]

What chamber does the "regular" 457 have.....? Or should I ask for the closest approximation to a know chamber design.

 

[nakoa01]

I'd like to chime in. I shoot CCI SV quite a bit. Out of all the 22 LR brands I shoot, CCI SV is the hardest to chamber in any match chambered rifle I have. I believe it is the best sub $3.00/box ammo for sale. From what I have seen it has a 15-20% flyer rate. From all the different brands I have shot I believe it to be as good or better than ammo like Eley Target, Practice 100 and even Club, RWS target Rifle, Semi Auto, SK Standard Plus, Sk Magazine and Flatnose Basic. When I say this I'm not talking about flyers, I'm talking about precision/accuracy. I believe at minimum you have to step up to SK Pistol Match or Wolf Match Target to get something consistently better.

Disclaimer: The above is what I have experienced with my rifles. Your experience may be entirely different. I do not have stock or any interest in CCI and I am not a 22 Plinkster fan.

Agreed on the .22 plinkster

 

[nakoa01]

I got my sons 457 put together. We are still on the fence about putting a Proof Research carbon fiber barrel. I also want to do a custom Cerakote job on it which should look pretty cool.

View attachment 7270913

I love the blue

 

[RandomWAguy]

Two CZ457s.

CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho

CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel

Am I the only one not seeing the pics?

 

[Kisssofdeath]

I seen the photos in my email notification but not here.

 

[reichco457]

Am I the only one not seeing the pics?

I can see the posted pics, very cool builds!

 

[Wysongdog]

i can't see the pictures either

 

[45ACP223]

Both totally different, I like them both. Great job!

 

[BJG56]

Can't see them either, but would like to.

 

[45ACP223]

If you see the blue box with the question mark. I just right clicked on it and checked "open in a new tab". This worked using a Mac.

 

[jcheng]

Just updated the post.

Let me know if you're able to see them now.

 

[eyekahn]

Two CZ457s.
View attachment 7273324
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho

View attachment 7273326
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel

Sucks that I had a proof carbon barrel for the MPA build but the Ticho was approved before I got to put a round through it....

Man that 18.5 barrel looks really good.

 

[nakoa01]

Two CZ457s.
View attachment 7273324
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho

View attachment 7273326
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel

Sucks that I had a proof carbon barrel for the MPA build but the Ticho was approved before I got to put a round through it....

Love the proof/manners

 

[Wysongdog]

Just updated the post.

Let me know if you're able to see them now.

Can see them now. Sweet ass work my friend. Love the manners and proof!!

 

[45ACP223]

Just updated the post.

So, have you shot them? Just curious, do you have a preference for the chassis or stock when shooting prone or off the bench?

 

[jcheng]

So, have you shot them? Just curious, do you have a preference for the chassis or stock when shooting prone or off the bench?

I have and the chassis is easier to shoot but it gets into the way of my ear pros

 

[Eoddave27]

Two CZ457s.
View attachment 7273324
CZ457 in a MPA Hybrid chassis, Athlon Cronus BTR in a Sphur mount, Area419 mount, hellfire brake, bolt knob, custom serielized KGMade Ticho

View attachment 7273326
CZ457 Precision Trainer, Athlon ETR in Sphur mount, Area419 mount, hellfire brake and bolt knob, 18.5" Proof Research barrel

Sucks that I had a proof carbon barrel for the MPA build but the Ticho was approved before I got to put a round through it....

How does that proof barrel shoot?

 

[jcheng]

A year later I’m almost ready to rock!

Action screw torque numbers anyone?

View attachment 7274506

Did Joe work that stock?

 

[jcheng]

How does that proof barrel shoot?

It's very consistent all the way through 250yds (the longest we have here) whereas the OEM starts dropping off after 150yds or so.

 

[Eoddave27]

It's very consistent all the way through 250yds (the longest we have here) whereas the OEM starts dropping off after 150yds or so.

What kind of ammo are you shooting? My factory barrel would only seem to shoot SK/ Lapua.

 

[jcheng]

What kind of ammo are you shooting? My factory barrel would only seem to shoot SK/ Lapua.

CCI but it likes eley match and center x the most.

 

[NAS78]

A year later I’m almost ready to rock!

Action screw torque numbers anyone?

View attachment 7274506

Start at 15 in/lb going up 5 in/lb up to 25 or 30. Shoot a bunch of groups at each 5 in/lb interval and let the rifle tell you what it likes best. I've read that 20 in/lb is what a lot of these rifles like

 

[bigwatchpilot]

I think the 455 consensus was 18 in/lbs was the sweet spot for most.

 

[jcheng]

Mine were 20 & 25 respectively

 

[45ACP223]

Mine liked 30 the best. Some say once you find the best torque, start adjusting the rear screw and see if that also makes a difference (ie. front 30 / rear 20).

 

[*rim-star*]

I shot my MTR yesterday with Center X, 7-5 shot groups that averaged .420" @ 50 yds. The rifle has about 400 rounds thru it so far, I was hoping for a little better, I do need to make adjustments to my rest and rear bag to fit the stock better. Hopefully with a few hundred more rounds it will improve some. Trigger is 10oz. used a 24X scope. Head space at .044" Thoughts ?

 

[flatland1]

Don't know how much difference it'd make, but I like headspace of .043" for SK/Lapua ammo. Have you shot any Eley through it to compare groups to what you normally get with SK/Lapua?

 

[*rim-star*]

Don't know how much difference it'd make, but I like headspace of .043" for SK/Lapua ammo. Have you shot any Eley through it to compare groups to what you normally get with SK/Lapua?

Yes, the Eley I tried was Eley Team, it did just a bit larger groups.

 

[Kisssofdeath]

.420" is not bad. The .044" headspace seems a little excessive especially for Eley rims.

 

[wquiles]

New guy with 457, so apologies for the dumb newbie question - but:
1) how exactly are you measuring it?
2) are you guys adjusting that headspace? if yes, how?

 

[*rim-star*]

.420" is not bad. The .044" headspace seems a little excessive especially for Eley rims.

Yes id rather have.042 for Eley, the rifle shows signs of wanting to shoot well, sometimes get 3 or 4 nearly thru same hole with 1 or 2 fliers.....hopefully more shooting will improve things a bit...thanks

 

[*rim-star*]

New guy with 457, so apologies for the dumb newbie question - but:
1) how exactly are you measuring it?
2) are you guys adjusting that headspace? if yes, how?

I shimmed my bolt, I check head space with plasti gauge

 

[45ACP223]

rim-star, can you describe how you shimmed the bolt and what you used as a shim?

 

[Kisssofdeath]

McMaster Carr 5/8 x 3/8 x .003 part # 380MC020 These require minor fitting.

That number is for super glue.

 

[reichco457]

New guy with 457, so apologies for the dumb newbie question - but:
1) how exactly are you measuring it?
2) are you guys adjusting that headspace? if yes, how?

Go to Lilja Barrel website they have a good video how its measured. I believe its found as a link on the CZ455 and CZ457 page.

 

[reichco457]

Go to Lilja Barrel website they have a good video how its measured. I believe its found as a link on the CZ455 and CZ457 page.

Here the link for measuring headspace

headspace. https://www.facebook.com/580697272005364/videos/338760933509372/

 

[*rim-star*]

Try this.. https://www.mcmaster.com/97022A169

 

[PossumK]

McMaster Carr 5/8 x 3/8 x .003 These require minor fitting. https://www.mcmaster.com/97022A169

That number is for super glue.

97022A128 - 316 Stainless Steel Round Shim, 0.001" Thick, 3/8" ID, Packs of 5
97022A216 - 316 Stainless Steel Round Shim, 0.002" Thick, 3/8" ID, Packs of 10
97022A169 - 316 Stainless Steel Round Shim, 0.003" Thick, 3/8" ID, Packs of 10
97022A193 - 316 Stainless Steel Round Shim, 0.004" Thick, 3/8" ID, Packs of 10

 

[*rim-star*]

97022A128 - 316 Stainless Steel Round Shim, 0.001" Thick, 3/8" ID, Packs of 5
97022A216 - 316 Stainless Steel Round Shim, 0.002" Thick, 3/8" ID, Packs of 10
97022A169 - 316 Stainless Steel Round Shim, 0.003" Thick, 3/8" ID, Packs of 10
97022A193 - 316 Stainless Steel Round Shim, 0.004" Thick, 3/8" ID, Packs of 10

I fixed it...sorry about that....link there now

 

[45ACP223]

I fixed it...sorry about that....link there now

Thanks, order placed, depending on how the bolt feels, the shims may not be a fix, but will temporarily allow me to test different head spaces. That's a good thang!

 

[Kisssofdeath]

I shimmed my bolt, I check head space with plasti gauge

How did you shim the bolt? Or did you actually mean the barrel?

 

[tatman3715]

i was interested in a Lithgow as well until i read about all the feeding issues, i really wanted one for a minute

 

[*rim-star*]

Take the bolt apart, place the shim between to two halves, sometimes you have to take a small amount off the diameter of the shim for clearance, I also lube the shim and mating surfaces real good.

 

[45ACP223]

Just curious, why do you need to lube the mating surfaces? Just for clarification the shim would be placed where the red arrow is, correct?

 

[*rim-star*]

Just curious, why do you need to lube the mating surfaces? Just for clarification the shim would be placed where the red arrow is, correct?View attachment 7277694

Yes thats correct, slows wear down, any type of grease or moly grease is what I use....just needs a little

 

[45ACP223]

Yes thats correct, slows wear down, any type of grease or moly grease is what I use....just needs a little

Thanks, I appreciate it!

 

[nakoa01]

Also a way to help fix those fliers bartlein drop in. I have 2 now and have been very impressed with both

 

[Easa]

So guys, have you seen this?

CZ 457 LONG RANGE PRECISION

www.czub.cz

 

[Merlin O]

Well ain't that purty.......

 

[Frankr]

So guys, have you seen this?

CZ 457 LONG RANGE PRECISION

www.czub.cz

View attachment 7280191

I think I’m in love.
How much?