Shot a pretty good target this morning in light wind. I know a lot of guys have had those 2500's but I'm still trying for my first. I don't know if these 78 year old eye will ever get it done, but I'm going to keep trying.
CZ 457
- Thread starter A-Rob
- Start date
ARA Targets
The official Target of the New Factory Class of American Rimfire Association, Inc. 25 Bulls and numerous sighters. Sold in packs of 100.
Jpenta gave you the link. It is scored worst edge. In other words if the hole breaks out of the circle it is scored the next lower point value. The points are 100, 50, 25, and 10. 2500 is a perfect score. The left most target in the sighter row shows scoring.
I’ve shot two matches with two different CZ’s. The first match Inshot with a 457 Varmint MTR, the second with a 452 American. Both times my first card was a 2500, but scores declined on the following cards. My next match will be shot with this setup.
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I have the official scoring plug from Killough and the magnifier
Is that the VPT MTR? I would have bought that if it had a 20.5” barrel.
I don’t like the 16” either. I went looking for a either a VPT 24” or a VPC 24”. The shop had both, but their test targets were pretty bad. I was eyeing the VPT MTR. I really like the stock. The only reason I hadn’t bought one already was because of the short barrel. I asked to look at the test target and it was a good one. I got a good price on it too. I figured if it wasn’t a shooter I’d put a Lilja barrel on it. I now have my BScar trigger in it.
As for how it stacks up on an ARA target the jury is still out. I shot two 2450’s on a front rest with a 6-24 scope Then I put the bipod on it and shot two 2400’s in heavy switching wind with a 6-24 scope. I was practicing holding for wind which is my biggest detractor. Yesterday I visited a 100 yard indoor range for the first time and it shot like crap. I only shot one card because I was testing different Ammo shooting groups. The target at 50 yards was pretty dark there. I couldn’t see that well. If I moved it to 60 yards there was plenty of light. I somehow mounted the scope (45x45) with a cant. I’ve installed dozens of scopes without issue. It must have rotated while torquing the rings and I didn’t check. That was throwing me off too. In no wind the one card I’ve shot with it that day was a 2350 with a few other line lickers.
As for how it stacks up on an ARA target the jury is still out. I shot two 2450’s on a front rest with a 6-24 scope Then I put the bipod on it and shot two 2400’s in heavy switching wind with a 6-24 scope. I was practicing holding for wind which is my biggest detractor. Yesterday I visited a 100 yard indoor range for the first time and it shot like crap. I only shot one card because I was testing different Ammo shooting groups. The target at 50 yards was pretty dark there. I couldn’t see that well. If I moved it to 60 yards there was plenty of light. I somehow mounted the scope (45x45) with a cant. I’ve installed dozens of scopes without issue. It must have rotated while torquing the rings and I didn’t check. That was throwing me off too. In no wind the one card I’ve shot with it that day was a 2350 with a few other line lickers.
I have the VPT 24” with 0 moa mount and Burris XTR Signature rings. I used a +10 moa under the rear ring. Works good at 50 and 100yds.
I have a Sightron SIII 45X45 fine crosshairs. I’m shooting off of a Randolph Machine front rest with an Edgewood “The Edge” front bag with slick material.
I have the same scope. I like it a lot. I did my research and was lucky enough to be able to look through several scopes at a match including NF Benchrest, Sightron 3 10-50, 45x;5, Weavers. What sold me on the Sightron 45 was price and the 1/10 MOA adjustment.
I noticed you weren’t using sighters at all. Do you use wind flags? Considering that you didn’t shoot sighters at all, that’s a darn good card.
I noticed you weren’t using sighters at all. Do you use wind flags? Considering that you didn’t shoot sighters at all, that’s a darn good card.
I shot several rounds on a practice target before going straight to the ARA factory. I’m shooting at a nice public range here in Florida, but they don’t allow flags. I have a bench top flag I use here. At my home club I use flags and a Beggs windicator.
Timney came out with a flat trigger bow version of their CZ457 trigger today. I ordered by inferior bent one on Monday... 
Says it hasn't shipped, trying to get them to change it... I was never able to dial down the weight on the trigger in my CZ below 3lbs. It isn't a bad trigger, especially compared to the standard CZ455 trigger in my other rifle.
Says it hasn't shipped, trying to get them to change it... I was never able to dial down the weight on the trigger in my CZ below 3lbs. It isn't a bad trigger, especially compared to the standard CZ455 trigger in my other rifle.I have 2 Cz 457, varmint and 24' At one. The varmint has a match bore the 24' doesn't . I use all 22 cleaning , jags, nylon brushes and fiber rod with no problem !
What did you use for shims? I used .006, R50s went fine but Eley 10x and match were hard getting fired cases extrated ? Now went to .008, waiting for a warmer day. I'm new, any help from anyone is greatly appreciated ! I own 2 CZ 457 one has a bad bolt guide. Anyone else had same problem?Here are a couple of pictures of mine if it helps. The second image is with a new Lilja barrel installed.
Hi, no shims. The .22 mag is cut to exact SAAMI specs. And it's a shooter
! Did you read their pages on the site about shimming? I might be wrong but I think I read that there are such variances with .22 LR ammo. I think you might be on the right track going to .008. Is there a shim combo that will make it .007? If so I would try that first. Lilja recommends torque on the barrel around 35-40 inch-pounds. CZ on the other hand recommends 48-inch pounds (video below). I went with CZ's recommended torque, which if you did not the additional tightening might make the chamber go even tighter, in which case .008 might be just right.In any case, I would email Carson Lilja at [email protected] and ask for his advice. He knows .22 inside out - a lot more than I do....
Please let us know how it goes!
JAS-SH
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My 457 with a 1-9 Lilja barrel was not great in accuracy with CX and SK LR ammo at 50 yards, like a 1.5 to 2 inches. After about 30-40 shots, it started to not extract. I contacted Lilja and they said to shorten the chamber by .002. In the mean time I added a EC tuner, set at bottom. I went to rezero and tune, but it was too windy to really tune it- but the groups were pretty tight as is- much better. Between zeroing, some dope work and a competition, I probably put 150 rounds through it with out any extraction issues.
Shortening the chamber was not the way I thought it would go- but it worked! Solved the extraction and accuracy issues.
I’m spinning up two 457s; one for me and one for the boy, with an eye towards long range 22lr- hence the 1-9 barrels. The second one I’m going to hold off on a tuner, so can run A:B experiments.
YMMV
I used a micrometer to measure my 457 receiver for setting the depth for my Lilja barrel. I can't remember the shim combination, but setting the headspace to 0.040 solved the extraction problem I was having with it set at 0.043. Looking at a post I made on Rimfire Central I think I used a shim combination for .006. RWS variants work fine, but it was a little hard closing the bolt with Eley Club.
I went down to .005 for shims which I think sets HS for .040. It worked fine yesterday with 1 ejecting problem with Eley match.I sanded down barrel channel a little, put limbsaver on barrel and back to range. R50 were flawless, CCI was hard closing bolt and wouldn't eject all 3. Federal UM was no problem for all 7. Eley match which I want for that rifle was terrible today from the first shot that didn't want to eject. I think I went through 15 with 4 extracting properly. Came home and examined bolt, I couldn't find anything wrong. Time to talk to Carson? R50 averaged about 1moa today compared to about 1.25moa yesterday (limb saver).
While I never measured them myself, CCI standards are reported to have thick rims which can give extraction/ejection hic-ups in some rifles.. I can tell you that they are the ONLY round to give me issues with positive extraction in my Savage B22 Precision. Fortunately, they are not the most accurate in this rifle so there is no need to chase that ghoul.
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My 457 trigger was just OK. I couldn’t get it under 3lbs. I guess for most things that is OK, and for a factory trigger I understand why they wouldn’t go lower. Not much creep in it and i worked it up so that it was acceptable, but for precision work, I ordered Timney triggers for my 457 projects. Just got them today- new flat version of the Timney457 trigger.
It's really easy to mod a 457 trigger to go light. But if timney, or better yet triggertech, would make a two stage, I'd be all over that in an instant.
Are you talking about going beyond the use of the set screw for weight? I couldn’t get it below 3lbs, and that was with unscrewing the damn thing.
And there's a 6 month wait. Of course it would take timney or tt that long or more to do a 2 stage, so I might as well get on the wait list.......
Mine was the same way. I could remove the set screw and it was still just under 3 lbs.
Really easy to remove the pivot pin. People say they can use brute force and pound it out, but if you grind a bit of the peen off one side, it comes out easy. Remove stock spring, replace with one of these from McMaster Carr. $6 for a pack of 12.
Heavy 9657K613 Much lighter than the stock spring. I didn't try them.
Medium 9657K12 This is what I used and is popular with others. Pull weight is in the can range from ~8 oz to a little over a pound depending on preload adjustment.
Light 965K11 Can't help but think this would be too light. Maybe for benchrest.
Shoulder bolt to replace trigger pin, $5:
91273A325 Requires a 3mm nut to go with it. Stock will need to be relieved slightly for the nut.
and just FYI, Shims for the bolt to reduce headspace. The OD needs trimmed slightly (otherwise will snag ejector), very easy to do with ordinary scissors.
.005" brass 92678A231
.002" brass 92678A161
steel shim set, 3088A931
I don't doubt it. It gets rave reviews. I didn't see a price on his site, I probably missed it. Are they $200 like the 455 2 stage?
Yes, I think that includes shipping. I got mine a few months so I don’t remember. Mine is set up for BR, single stage 3oz. It’s just a matter of adjusting.
I was able to get two 457 triggers down to 8 and 11 ounces using the McMasterCarr 965K611 spring. I recently got a BSCAR trigger in a 3oz. single stage. I’ll buy another when my name rolls back around on the list one day. It’s an awesome trigger. I gave $200 for mine shipped.
I had 1.234 on depth, 1.191 on insert? length for headspace .043 is that right? Somewhere, maybe this thread CZ sets headspace at .046, I'm trying to figure all this out. On triggers- CZ down to under 6oz (cut spring), Timney 3-4oz.
FWIW, a simple 5 min spring change can get the 457 trigger down to 12-20 oz . I've done all 3 of my 457's to date and am 95% happy with them. That said, I was going to try a Timney in my latest build but was backordered. They were out of stock near everywhere I looked. You were lucky to get them. I just did the rifle that was destined for last night. It's set right at 15 oz.
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I just took a short piece of 0.062 rosin core solder, formed it into a "U" the same diameter of the rim of a cartridge, stuck it to the bolt with grease, closed the bolt. The outer edge of solder will get smashed and become the thickness of the headspace. Measure carefully with calipers. Kinda sorta similar to using plastigauge, but I couldn't find my old stash of plastigauge.
I just rec'd my new 457 LRP and I have the same problem. Did you solve it on yours and if so what did you do. Thanks,
Does anyone have measurements for the .22lr magazine spacer pin? I’m collecting parts for a 457 chassis build, I’ve got an extended mag release and will be getting an IBI barrel. I haven’t actually picked up a 457 yet, if I can find one of those pins at McMaster-Carr when I order a trigger spring I could go with a .17 or .22mag and have the option of a switch barrel. Thanks
You can order the pin and spacer from the CZ store or Pete's Pillars (all metal DIP brand) on Ebay. I just converted a .17 hmr to .22lr with the DIP kit and it's nice quality. Sorry, I don't have it handy to measure. The pin fit is pretty critical and precise . I'd be surprised if there was an exact match off MC to be honest.
I just got another one of these in, 3oz., single stage. I really like these. It makes a world of difference when shooting bench rest disciplines.
So I had my CZ build apart last night to install an extended mag release so I took a measurement on the mag spacer pin too. It's .158" x .600". No taper on the ends. Whatever pin you came up with would have to be spot on. For the $6, I'd say just order the factory part when you get the spacer itself. hth.
Hmm. Obviously I had to use a little force, but it wasn't hard. Couple things I can think of. I have real lead solder. Not the lead free stuff. Lead is softer. It's also rosin core, not solid.
Finally got my Element Helix mounted and zeroed. Did some ammo testing. SK Biathlon Sport really shined at 100 yards…..5 shots
Happy with the look and performance. Was a good trade for a couple days weekend work.
(Sorry….no uodated pic with optic yet)
Got an Anarchy Outdoor Titanium bolt knob to Cerakote and install. Oh yeah, and little guy was super quiet with the Tac Sol Axiom suppressor. Can’t wait to stretch it out with the SK Biathlon. Looking like fun. Wasn’t even looking for a bolt 22. Mainly been shooting a modded 10/22 with Volquartsen barrel, Tac Sol X-Ring SBX and Kidd Supergrade. This shoots considerably better. I was expecting good things from reading about the CZ’s but didn't expect this level of accuracy or consistency. The Lapua X-act and SK Pistol shot well too, but not like the Biathlon. Good thing I have a brick.
Happy with the look and performance. Was a good trade for a couple days weekend work.
(Sorry….no uodated pic with optic yet)
Got an Anarchy Outdoor Titanium bolt knob to Cerakote and install. Oh yeah, and little guy was super quiet with the Tac Sol Axiom suppressor. Can’t wait to stretch it out with the SK Biathlon. Looking like fun. Wasn’t even looking for a bolt 22. Mainly been shooting a modded 10/22 with Volquartsen barrel, Tac Sol X-Ring SBX and Kidd Supergrade. This shoots considerably better. I was expecting good things from reading about the CZ’s but didn't expect this level of accuracy or consistency. The Lapua X-act and SK Pistol shot well too, but not like the Biathlon. Good thing I have a brick.
