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Old 07-08-2019, 09:17 PM
Frontrange42

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Glass bedding cz457



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Hoping to improve groups by glass bedding. My plan is to full bed action and 1.5” of barrel near chamber. I’ve been reading about some of you guys doing this to your 455’s and 452’s. Thanks for sharing your info! This will be my first bedding job. I want to free float barrel and then play with shims under barrel to see if accuracy improves more. If I tape the barrel to make sure it’s free floated, won’t I be lifting the action off the front pillar? I don’t want that do I? Also what would you all recommend when it comes to that floating recoil lug as far as bedding it goes? Any help much appreciated.
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Old 07-08-2019, 09:22 PM
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Also how much do you think this will shrink group size? Or maybe no noticeable difference?
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Old 07-08-2019, 10:24 PM
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I donít understand what you mean by tape the barrel. When I bedded mine I put tape around the front of the stock to make sure the action seated in the rear of the stock Then I wrapped electrical tape around the rear of the action. Then I lightly tightened the action screws , donít forget the release agent If you want to experiment with pressure points a piece of bicycle inner tube can be placed under the barrel

As far as groups , mine got a little tighter, but a whole lot more consistent with less flyers. The gun felt more solid as well
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Old 07-08-2019, 10:49 PM
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Most instructions I’ve watched show wrapping tape in one spot near forearm tip with masking tape, just enough to center barrel in forearm and make sure barrel is free floated.
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Old 07-10-2019, 07:13 PM
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Stock prepped and ready for epoxy! Just waiting on the recoil lug I lost. Let me know if you guys see something wrong with this.
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Old 07-10-2019, 10:23 PM
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If your pillars were set correctly your barrel should be centered. If you are taping the barrel and it is moving the barrel and action then you won't have a stress free bedding job, it will be putting pressure against the pillers sideways. I hope I'm clear, the time to use tape to center the barrel would have been when epoxying the pillers in but you are past that.
Looks like you have prepped well, probably a little excessive but that is normal on your first few bedding jobs. Good job and it gets easier as you do more, just make sure you get all metal prepped with release agent. Good luck
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Old 07-10-2019, 10:43 PM
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Iím not familiar with the position of the barrel lug in the 457... but I bedded a 452 the way you have yours mapped out and it shot
like crap. I stripped out the bedding & started over, bedded the receiver and entire barrel channel up to & including the barrel lug, with a custom pillar for the rear action screw & brass escutcheon for the barrel lug. I also installed a tiny #6 Allen plug screw inside the barrel lug to lock it in place. Results were excellent.
Bedding compound was Devcon 10110 Plastic Steel putty, release agent Kiwi neutral shoe polish.







Pic heavy bedding thread:

https://www.rimfirecentral.com/forum...d.php?t=553469

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Old 07-10-2019, 11:04 PM
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Quote:
Originally Posted by Frontrange42 View Post
Most instructions I’ve watched show wrapping tape in one spot near forearm tip with masking tape, just enough to center barrel in forearm and make sure barrel is free floated.
that tape is only there to center the barrel in the channel. It should not be used thick enough to lift the action from the pillars.
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Old 07-11-2019, 04:59 AM
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Grg, the pillars were set at the cz factory. I have no idea if they are centered. I guess I just assumed they were. They are some kind of dense composite material.
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Old 07-11-2019, 05:36 AM
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Hi DrGunner. Yes, I’m very familiar with your bedding job post. I’ve read it and reread it and enlarged photos. Your post was the google search that brought me to rimfire central. Most informative. Thank you.
Cz 457 recoil lug is a floating square of metal that sits back at the tang. I’m not sure what it does because it’s a loose fit in the slot that it mates to in the action and a sloppy fit in the stock.
Looks to me like your rifles front action screw is up in the barrel channel? Could that be why your rifle didn’t respond well till you bedded clear up to it? (If I’m understanding what you wrote).
Why did you have remove bedding material? Couldn’t you just add more to go further up the barrel?
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Old 07-11-2019, 05:51 AM
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Rms65 I see what you mean about the tape. I could tell when I didn’t have enough wraps of tape because I could feel the barrel come down and tang go up. So I just checked after every wrap once I was close and made sure to not be bringing barrel up and tang down.
Its pretty simple to me now but when I keep doing this job in my head through each step, that step kept tripping me up.
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Old 07-11-2019, 02:56 PM
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Lug was in the mail today! My first time experience with CZ customer service was great. So here it is... epoxy in and then action in. Somebody mentioned something about release agent? 😁
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Old 07-11-2019, 06:11 PM
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Looking forward to seeing the results. You did remember the release agent, right ?
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Old 07-11-2019, 06:45 PM
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Yes, but must admit there is a little voice saying,” I sure hope it comes out of the stock”.
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Old 07-11-2019, 06:51 PM
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Originally Posted by Frontrange42 View Post
Yes, but must admit there is a little voice saying,” I sure hope it comes out of the stock”.
All you can do now is wait till it cures and see. Seems like you’ve done your research and watched some videos. Keep us posted. Also, what material did you use to do the bedding ?

Last edited by SLS; 07-12-2019 at 06:02 PM.
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