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  #16  
Old 07-11-2019, 10:37 PM
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Quote:
Originally Posted by Frontrange42 View Post
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?
Thanks for the kind words. I didn’t know if the 457s have a barrel lug...

To answer your question- I’ve done my own bedding jobs for quite a few years now. I’ve found, in general, when I’ve bedded an action for free float & found poor results, it’s usually the case that more of the barrel requires support for good harmonics, especially sporter/taper barrels. When I’ve done as you suggest- and I have, it usually works fine – at first. But unfortunately, in a few cases I have found that the bedding material fails and cracks in time at the interface where the original bedding meets the new. Therefore, if I decide to substantially change the amount of surface area bedded, I remove the old and rebed the entire action up to the new ending point so that it’s all done in one run, one batch, one curing. Is it absolutely necessary? Probably not. But my OCD streak will let me do no less, lol.

Looks like you did a great job, looking forward to seeing the results, bedding and targets-

Fingers crossed!


BTW- keep at it with the bedding work- it gets easier, I assure you. I bought a handful of beater stocks dirt cheap on EBay years ago, practice is the key, IMO

Regards,

DrGunner
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  #17  
Old 07-12-2019, 06:48 AM
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I too am looking forward to seeing and reading about your results Mr range42, - as I also have a 457 American and am curious if bedding would help with consistency and accuracy.
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  #18  
Old 07-12-2019, 03:11 PM
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I took out the action before work today. It came right out with a little bit of wiggling back and forth. I’m happy with it. I have one little void directly in front of action screw where receiver meets barrel. Bugs me more than it effects accuracy. Now to clean it up!
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  #19  
Old 07-12-2019, 03:16 PM
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Forgot the pics
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  #20  
Old 07-12-2019, 03:31 PM
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Dr.Gunner.. what your describing is a cold joint from pouring epoxy next to cured epoxy. I’ve never done it but wonder if a you used a dremel to cut little dovetails into the cured epoxy before pouring next to it. Probably would still see a hairline crack but you would at least achieve a mechanical bond.
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  #21  
Old 07-12-2019, 04:09 PM
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That looks very nice. You’ve inspired me to think about trying it myself ( perhaps with a little help ) . Please post pics of the final product and after targets.

Last edited by SLS; 07-12-2019 at 04:45 PM.
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  #22  
Old 07-12-2019, 10:07 PM
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Quote:
Originally Posted by Frontrange42 View Post
Dr.Gunner.. what your describing is a cold joint from pouring epoxy next to cured epoxy. Iíve never done it but wonder if a you used a dremel to cut little dovetails into the cured epoxy before pouring next to it. Probably would still see a hairline crack but you would at least achieve a mechanical bond.
Iíve tried beveling, undercutting, and notching.... Devcon will bond to itself pretty well, but Iíve seen enough ďadd onĒ jobs eventually show cracking from flex over time that I just redo it. Iíve done enough rifles that itís not so much trouble-
My best results have always come from doing the entire thing in one batch when I can.

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  #23  
Old 07-12-2019, 10:11 PM
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Forgot the pics
That looks great!!! And that little defect is cosmetic & will NOT affect performance, but I know what you mean about it bugging you, Iíve tortured myself the same way often enough. Wait til you see how it shoots- if it improves from before, itíll be MUCH easier to ignore, lol.

Great work!



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  #24  
Old 07-12-2019, 10:51 PM
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Cleaned it up, put action in, and mounted scope. I’ll shoot it early in the morning to see what it does. I used a Pro Bed 2000 4oz. kit (brown).
That trigger took me 2 hours to get back on the receiver! I took it off thinking...how hard could this be I don’t need to pay attention to how it’s on. Live and learn.
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  #25  
Old 07-12-2019, 11:04 PM
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Quote:
Originally Posted by DrGunner View Post
Quote:
Originally Posted by Frontrange42 View Post
Forgot the pics
That looks great!!! And that little defect is cosmetic & will NOT affect performance, but I know what you mean about it bugging you, I’ve tortured myself the same way often enough. Wait til you see how it shoots- if it improves from before, it’ll be MUCH easier to ignore, lol.

Great work!

<img src="https://www.rimfirecentral.com/forums/images/smilies/sthumb.gif" border="0" alt="" title="Blue Thumb" class="inlineimg" />

DrGunner
Thanks! Yep, shooting it tomorrow will be the real test. That flaw will go away if it shoots well.
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  #26  
Old 07-12-2019, 11:14 PM
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That looks very nice. You’ve inspired me to think about trying it myself ( perhaps with a little help ) . Please post pics of the final product and after targets.
Thanks. Not sure where your going find good help. You might be able to find an amateur with one bedding job under his belt. Let’s see how it shoots first and if this way of bedding is the right way to go with this rifle. If it doesn’t shoot good I’m going to try shims under barrel at various places.
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  #27  
Old 07-13-2019, 05:28 AM
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Quote:
Originally Posted by SLS :
That looks very nice. You’ve inspired me to think about trying it myself ( perhaps with a little help ) . Please post pics of the final product and after targets.
I practiced on a junk gun. The OP using a gel or fiber mix. I used a very runny hi-viscosity mix - it was awful. You want the stuff the OP is using. I assume acraglas gell. Not regular acraglas, but this stuff with the fibers mixed in:

https://www.brownells.com/gunsmith-t...-prod1038.aspx

You can get other advise, be skeptical of ways to save a nickle on your prize possession. And run an experiment on a junker gun you dont care much about. it is not as easy as it looks.

The OP has the pillars in place to start. That is how I did my 2nd attempt. I set the pillars in place with bedding first. after that setup. I did the gun. I dont know if there is a right or wrong, but; I can tell you - You dont want to be adjusting stuff after the epoxy is applied. Make 100% sure it dry fit prefect. You can secure the gun with screws or rubber tubing. And there is no way for epoxy to be oozing out where you did not expect it. And the obvious, dont get it all stuck together.

Last edited by fourbore; 07-13-2019 at 05:40 AM.
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  #28  
Old 07-13-2019, 03:08 PM
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Shot the rifle this morning. No huge improvement. The rifle is still very finicky as to torque setting. Was hoping it wouldn’t be. After shooting enough groups of sk standard plus to find out what torque setting was best, I shot 16 groups of five shots. Measured them as usual, totaled them up, and divided by amount of groups. The new average is .563” compared to .610” for a difference of .047”. Not much. This was also a new lot of ammo then I used before bedding. Shimming barrel did nothing to help groups.
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  #29  
Old 07-13-2019, 03:52 PM
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Well that’s a hoot. Was watching this closely. Looks exactly like my groups using standard plus out of my 457 American. But let me share with you - recently have tried pistol match and my groups look completely different - nice 1/2 inch groups with an occasional flyer or shooter pull. Actually groups slightly better than my recent lot of center x. May wanta give that a try. Only thing I have done is put a patch support under barrel at receiver. Well for me I guess I just need to accept the fact that my rifle is a taper barrel sporter. And it is what it is. :-).
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  #30  
Old 07-13-2019, 04:37 PM
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Quote:
Originally Posted by Frontrange42 View Post
Shot the rifle this morning. No huge improvement. The rifle is still very finicky as to torque setting. Was hoping it wouldn’t be. After shooting enough groups of sk standard plus to find out what torque setting was best, I shot 16 groups of five shots. Measured them as usual, totaled them up, and divided by amount of groups. The new average is .563” compared to .610” for a difference of .047”. Not much. This was also a new lot of ammo then I used before bedding. Shimming barrel did nothing to help groups.
where's your POA on these groups? SK plus your best ammo tested? You may have to test others again because barrel harmonics may have been changed by the bedding.
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