CZ 457

#2,701
Today I took the stock off and fiddled with the adjustment screws. I think I got it in the neighborhood of a pound and half. I did blast the trigger with some carb cleaner and it really got rid of most of the gritty feel. I’ll give it a try when the Bravo shows up and see how it does and if I’m not satisfied with the trigger I’ll do the spring for sure.

I’ll give y’all a run down in a couple of weeks after parts show up.
 
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#2,702
Question on a snap cap extraction issue.

Have not fired a live round out of a new 457 scout. Have tried some dry fire with snap caps, and the snap cap gets lodged in the chamber and fails to extract.

I read from the CZ FAQ that their barrels are tight, and a .22 sized cleaning rod would be too big for the barrel. Found this out the hard way.

I’m wondering if this is causing the snap cap to fail as well. Is this normal? Should I go ahead and live fire or get fixed / send in for warranty?
 
#2,703
Nik S said:
Question on a snap cap extraction issue.

Have not fired a live round out of a new 457 scout. Have tried some dry fire with snap caps, and the snap cap gets lodged in the chamber and fails to extract.

I read from the CZ FAQ that their barrels are tight, and a .22 sized cleaning rod would be too big for the barrel. Found this out the hard way.

I’m wondering if this is causing the snap cap to fail as well. Is this normal? Should I go ahead and live fire or get fixed / send in for warranty?
Click to expand...
Live fire. Some snap caps aren’t up to par.
 
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#2,705
Progress photos!
 

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#2,708
We also have done extensive testing to confirm these are compatible across various stocks and chassis combos.

I have used these for numerous matches these last few months with no issues, and let others try them out after matches without fail.
 
#2,712
Keel Haul said:
Not a fan of the plastic factory unit so I’m definitely in for some of those mags as well.
Click to expand...
The plastic CZ mags actually work really well, as do the 10 round versions. Mine have thousands of rounds through them without a hitch. I’m in for some 13 round mags though. Holding my breath until then.
 
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#2,714
lash said:
The plastic CZ mags actually work really well, as do the 10 round versions. Mine have thousands of rounds through them without a hitch. I’m in for some 13 round mags though. Holding my breath until then.
Click to expand...
I don’t want to imply there was an issue with the mags because I haven’t had an issue with the one time I’ve had the 457 out so far. It’s just the plastic one felt... cheap... I guess is the best way to describe it, compared to other metal magazines I’ve had with other 22’s I’ve owned.
 
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#2,715
Keel Haul said:
Today I took the stock off and fiddled with the adjustment screws. I think I got it in the neighborhood of a pound and half. I did blast the trigger with some carb cleaner and it really got rid of most of the gritty feel. I’ll give it a try when the Bravo shows up and see how it does and if I’m not satisfied with the trigger I’ll do the spring for sure.

I’ll give y’all a run down in a couple of weeks after parts show up.
Click to expand...
It's not hard to get the trigger pull into the single digit range with just a spring swap and some adjusting. I've done over 10 457's to date myself. Most of mine settle into a very crisp, consistent 10 oz which is where I like them. Others report going lighter than 6 oz with the same treatment but I have not done so myself. Procedures /info can be found over at RFC. BTW, I found the two Timny's to be a disappointment for anything under 1# or so. . Any attempt to get them below 14 oz or so would result in wild variations in break values ( Read swings from 5 oz to 12 oz). When I contacted Timney about this, they said that was normally and the Triger was not designed to go below 10 oz. They also went on to say that that 10 oz was measured at the very tip of the trigger (which is not how most of us use them). On a factory set "10 oz trigger" my Lyman scale was showing 1#, 2 oz mid blade.
 
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#2,716
Thesepaperwings said:
I haven't had any issues at all with my plastic ones, I couldn't even tell you how many thousands of rounds they have. The reason for the billet mag was something we wanted to try and take out some of the issues that extensions can cause.
Click to expand...
My plastic mags feel cheap but run better than my metal 5 rounders. Got a 5 round metal mag that is totally POS.

Metal mag feels better and looks better but performance isn’t as good.
 
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#2,717
The only steel CZ mag I've ever tried was the 5-rd one that came with the Varmint MTR. Worked ok I guess, but I didn't use it often enough to really put any large number of rounds through it - I've only owned two of the poly CZ 10rd mags, and have used the dickens out of them, with no issues. I would like to get my hands on a couple of the L3i 10rd mags, but only because they appear to be a high quality unit. I've never shot my Shilen barreled 457 American or VPT in competition because I had a Vudoo repeater before buying any of the 457s, and competition was the main justification for buying the Vudoo. One of these days though, I'd like to run the 457 VPT in a match, just to compare it to the V22.
 
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#2,718
Frankr said:
My plastic mags feel cheap but run better than my metal 5 rounders. Got a 5 round metal mag that is totally POS.

Metal mag feels better and looks better but performance isn’t as good.
Click to expand...
These aren’t those stock ones, and do run much better than the stock plastic ones.
 
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#2,720
lash said:
What do you mean by that? I realize that the 10 rounders are not supplied with a rifle as purchased, but they are most certainly stock CZ mags.
Click to expand...
That the pics I posted aren’t the stock stamped metal ones. They are machined and have been running better than the standard 10rd plastic ones.
 
#2,721
J_D said:
That the pics I posted aren’t the stock stamped metal ones. They are machined and have been running better than the standard 10rd plastic ones.
Click to expand...
Ah, okay. I missed the reference and thought you were talking about the plastic ten round mags. As I may have mentioned before, I bought a metal 10-rounds mag from cz-parts in Czech Republic and it did not fit correctly into the mag well of my stock 457 and then I was unable to get it out without taking the action out of the stock and removing the mag well.

Never even tried to shoot and see how it fed. It sits in my drawer of junk now.

That’s why I’m so interested in your metal mags.
 
#2,722
lash said:
Ah, okay. I missed the reference and thought you were talking about the plastic ten round mags. As I may have mentioned before, I bought a metal 10-rounds mag from cz-parts in Czech Republic and it did not fit correctly into the mag well of my stock 457 and then I was unable to get it out without taking the action out of the stock and removing the mag well.

Never even tried to shoot and see how it fed. It sits in my drawer of junk now.

That’s why I’m so interested in your metal mags.
Click to expand...
I can only speak to the 10 and 13rd versions.....the 15 rds are on the way. I have tested a pair of 13rd ones in many matches without any issues and that was before the specific longer springs were used. These are dialed in.
 
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#2,728
kthomas said:
Never heard of them before - thanks for bringing them to my attention.

Are DPG's CZ 457 builds known to be better shooters than A419?
Click to expand...
There are few threads about Kenny's builds....I'd start there. I'm on my 4th build from him. My CZ shoots as good as my Vudoo build. DI, Modacam, and DPG in my opinion are where I'd put my money in the rimfire world at the moment. I've had 2 of the 3. I only put my DPG CZ on the PX here because my DPG Vudoo is more flexible in the REM 700 footprint. They shoot the same.
 
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#2,729
Anyone having issues with a very tight bolt close on Eley ammunition on a stock CZ 457?

I put in one Eley Match in my 457 this week and the bolt close was really hard - the round shot around 4" to the right of all my other groups of RWS. That was the only one I tested.
 
#2,731
Just got a CZ 457 Varmint and am in the process of selecting ammo for it. Is there a preferred procedure for this? Should I shoot a few hundred rounds to polish the bore before I get serious about ammo selection?
 
#2,732
Mainer said:
Just got a CZ 457 Varmint and am in the process of selecting ammo for it. Is there a preferred procedure for this? Should I shoot a few hundred rounds to polish the bore before I get serious about ammo selection?
Click to expand...
My experience over the last 18 months is that my CZ457 24" varmint did not like Eley Club.
It was OK with SK Rifle Match (OK good, but not OK stellar).
Tried Hornady Varmint Express (not the copper coated version...just the plain lead, solid, round nose) and it was quite accurate (made by CCI apparently).
Then I tried Norma Tac-22 and 'bingo'.
My rifle loves it.
I only shoot indoor 25 yard rimfire benchrest and the Norma is the most accurate ammo in my rifle.
I have, in the last 3 weeks, done a bolt shim job (added 5 thou shim) and that too helped my scores. Best yet is a 100.7 which you may find hard to relate to.
Basically it's one card with 10 'targets' on it. Get dead centre on the target and it's a 10.1 score. Slightly off dead centre and it's only a 10 score (or worse).
The centre 'dot' is 1.5mm diameter.
I'm told that Eley ammo has a 2 thou thinner rim than the Norma.
If I shimmed my bolt another 2 thou tighter then 'maybe' my rifle might like Eley?
I'd say definitely try the Norma Tac-22, and the Hornady Varmint Express.
Norma is repackaged RWS I have read. So RWS Rifle Match should be fine too.
From new my rifle shot well. I don't think it's shooting 'better' now I've put about 2000 rounds through it.
Maybe I got a good barrel in the barrel lottery.
 
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#2,733
Grey Kiwi said:
My experience over the last 18 months is that my CZ457 24" varmint did not like Eley Club.
It was OK with SK Rifle Match (OK good, but not OK stellar).
Tried Hornady Varmint Express (not the copper coated version...just the plain lead, solid, round nose) and it was quite accurate (made by CCI apparently).
Then I tried Norma Tac-22 and 'bingo'.
My rifle loves it.
I only shoot indoor 25 yard rimfire benchrest and the Norma is the most accurate ammo in my rifle.
I have, in the last 3 weeks, done a bolt shim job (added 5 thou shim) and that too helped my scores. Best yet is a 100.7 which you may find hard to relate to.
Basically it's one card with 10 'targets' on it. Get dead centre on the target and it's a 10.1 score. Slightly off dead centre and it's only a 10 score (or worse).
The centre 'dot' is 1.5mm diameter.
I'm told that Eley ammo has a 2 thou thinner rim than the Norma.
If I shimmed my bolt another 2 thou tighter then 'maybe' my rifle might like Eley?
I'd say definitely try the Norma Tac-22, and the Hornady Varmint Express.
Norma is repackaged RWS I have read. So RWS Rifle Match should be fine too.
From new my rifle shot well. I don't think it's shooting 'better' now I've put about 2000 rounds through it.
Maybe I got a good barrel in the barrel lottery.
Click to expand...
Did you start ammo selection on a new barrel, or did you "season" the barrel with a certain number of rounds before selecting your preferred ammo?

If you started on a new barrel, have you retested any of the ammo you rejected to see if it shoots differently?
 
#2,734
Mainer said:
Did you start ammo selection on a new barrel, or did you "season" the barrel with a certain number of rounds before selecting your preferred ammo?

If you started on a new barrel, have you retested any of the ammo you rejected to see if it shoots differently?
Click to expand...
Started with a new rifle.
Put 200 rounds through it just to see how it shot, and get the scope, etc sorted. Used SK Rifle Match and Eley Club. Both shot to same POA so that was OK.
Put another few 100 rounds SK and some RWS through to season the barrel (well I just used what I had and shot lots of practice rounds while I decided what front rest, rear bag, etc I wanted)...but I do clean the barrel about the 50-60 rounds mark. I'm ex military and I like a clean barrel!
Had a few fliers with the SK, and a few FTF with the Eley Club. The RWS Rifle match was fine...but then could find no more here in NZ.
The SK would shoot fine but the odd flier ruined a few targets for me. Could actually hear the difference in the 'bang' as the shot fired. So the ammo is not consistent (but what .22 ammo really is?).
The Club I sorted by doing the firing pin mod, and polishing the firing pin flat surfaces. Polished the bolt including all the little inlets, grooves, etc.
The bolt is so slick now it feels like it runs on well oiled rollers.
The Eley Club was my main ammo for just over a year but still I felt I could do better (I'm retired so I'm not into buying Tenex at nearly $NZ40 per box).
The Club was adequate for the start of my benchrest adventure (I have shot a lot of prone but got too old to get down on the floor and get back up again!).
So...enter the Norma Tac-22. Tried it, shot a 100.2, thought that's OK, and have now many times shot 100+ with the Tac-22 ammo.
Could do that now and then with Club but not target after target.
Have now sold my stock of Club, and SK ammo and just kept the Tac-22 and a few remaining boxes of RWS.
So yes, seasoned the barrel with Club and SK.
Continued shooting both up until a few months ago when the Tac-22 became available locally.
I held the Club round up beside the Tac-22 round and my eyesight tells me that the Club has a slimmer nose profile. The Tac-22 looks to be 'fatter' at the nose.
But could be 76 year old eyesight of course. I think the Tac-22 is a different profile anyway, and my rifle likes it.
Now I have used the bolt shims it's possible that the Club would be fine in my rifle (if I added another 2 thou shim maybe would help?).
I have fine tuned my gear too of course. Slicked up a Farley co-axial 2 front rest with UHMW tape and low friction grease. Made a better rear bag slider.
Little by little I am inching to that 100.10 (10 shots dead centre) and it's not all about the ammo.
 
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#2,735
My 457s nor my 455 don't like Eley at all. 3 or 4 varieties were tried and none performed well enough to even buy another box. I believe it has to do with the type of lube which is a sorta dry substance. SK ammo, with it's waxy/oily lube, is by far my choice with Standard Plus shooting well and Long Range Match shooting exceptionally well. Tac-22 and CCI SV also shoot well from all 3.
 
#2,736
Grey Kiwi said:
My experience over the last 18 months is that my CZ457 24" varmint did not like Eley Club.
It was OK with SK Rifle Match (OK good, but not OK stellar).
Tried Hornady Varmint Express (not the copper coated version...just the plain lead, solid, round nose) and it was quite accurate (made by CCI apparently).
Then I tried Norma Tac-22 and 'bingo'.
My rifle loves it.
I only shoot indoor 25 yard rimfire benchrest and the Norma is the most accurate ammo in my rifle.
I have, in the last 3 weeks, done a bolt shim job (added 5 thou shim) and that too helped my scores. Best yet is a 100.7 which you may find hard to relate to.
Basically it's one card with 10 'targets' on it. Get dead centre on the target and it's a 10.1 score. Slightly off dead centre and it's only a 10 score (or worse).
The centre 'dot' is 1.5mm diameter.
I'm told that Eley ammo has a 2 thou thinner rim than the Norma.
If I shimmed my bolt another 2 thou tighter then 'maybe' my rifle might like Eley?
I'd say definitely try the Norma Tac-22, and the Hornady Varmint Express.
Norma is repackaged RWS I have read. So RWS Rifle Match should be fine too.
From new my rifle shot well. I don't think it's shooting 'better' now I've put about 2000 rounds through it.
Maybe I got a good barrel in the barrel lottery.
Click to expand...
Where did you buy the 24” Varmint from?
Ive only seen the 20” versions for sale in NZ.
 
#2,737
Mainer said:
Did you start ammo selection on a new barrel, or did you "season" the barrel with a certain number of rounds before selecting your preferred ammo?

If you started on a new barrel, have you retested any of the ammo you rejected to see if it shoots differently?
Click to expand...
Ask 10 people and you'll probably get 15 different answers... My take after competing for several years:

1. Shoot 100-200 rounds before investing in a particular ammo.
2. Consitency (and accuracy) usually tracks with price.
3. Lots vary quite a bit. Don't discount one particular ammo if you've only tested one lot of it.
4. A good lot will likely be good in any gun. A bad lot will likely be bad in any gun.
5. CZ's chambers and headspacing seems to favor SK/Lapua rims over Eley in the 3 rifles I've personally tested.

I pretty much just grab a few different lots of SK LRM and Lapua Long Range and shoot a few 10-shot groups out of each. If one lot is a clear winner, buy as much as you can afford to.
 
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#2,739
Grey Kiwi said:
I'd say definitely try the Norma Tac-22, and the Hornady Varmint Express.
Norma is repackaged RWS I have read. So RWS Rifle Match should be fine too.
Click to expand...
I'll try some of the Tac-22. Found some on sale for $4 per box of 50. Very economical! Is this the same Tac-22 you are talking about?

www.aeammo.com

Norma TAC-22 .22 LR Subsonic 40gr HP 22LR 50/box

Norma TAC-22 .22 LR Subsonic 40gr HP 22LR 50/box
www.aeammo.com
 
#2,740
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#2,747
GIXXER2000 said:
Just got a CZ457 MTR and does anyone know what the spacing between the 2 front studs is?? I want to use a pic rail.
Thanks for any help.
Click to expand...
I did that on mine, but be forewarned that the studs on the MTR stock are just short wood screws. The are not the typical machine screws and will likely pull out under any heavy use.
In my case, I purchased a couple T-nuts and used a Forster bit to drill the recess on the inlet side with machine cap screws to attach the rail.
 
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