Defiance Pre-fit tenon dimensions

[FireMedic]

I’m wanting to chamber a defiance ruckus/anti prefit for future use. I’ll be in the middle of a move soon and will be without a lathe for a while. I called defiance to get some tenon measurements and they would not give them to me. They said it was their policy to not give out tenon measurements.

Could someone help me out with headspace measurement, tenon length and bolt nose recess depth?

thanks!

 

[WVHick]

Bump. Anyone ever get a print? I wanna laminate one for my garage shop

 

[Edd]

Bump. Anyone ever get a print? I wanna laminate one for my garage shop

Do you not have the action?

 

[WVHick]

Nope. One on the way should be here next week. I was hoping someone had a nicely done one I could just print instead of my shitty handwriting

 

[Edd]

I stole this from SH, maybe it will make things neater.

 

[GenePoole]

Aren't Stiller actions built to Defiance dimensions? Seems like I did a Stiller re-barrel some years back and the customer provided me with a Defiance print (Maybe it was the other way around). It fit perfectly. I'll have to dig through my notes when I get to the shop.

 

[rijndael]

the customer provided me with a Defiance print (

Defiance doesn't publish prints. You have to measure it yourself, call them, and they will verbally work through the numbers with you.

 

[Dusty Stevens]

Defiance has too many bolt nose options to publish

 

[rijndael]

Defiance has too many bolt nose options to publish

True, but even with actions that have no bolt options, like the AnTi, Ruckus and Tenacity, they still won't publish one. Their argument against publishing one is about liability. Glen talks about it here:

https://www.snipershide.com/shooting/threads/prefit-info-needed.7008996/post-8604927

 

[Dusty Stevens]

I just cant see it as a liability if their actions are held to a standard, if the barrel is made according to the print it should be right. If not, its not on them.

 

[rijndael]

I guess they just want to hear the one that slipped past QC from a gunsmith who measures, rather than a customer who had an accident.

 

[Dusty Stevens]

Well they can always say .008 wasnt enough nose clearance. If it was on a print they couldnt

 

[GenePoole]

I

Defiance doesn't publish prints. You have to measure it yourself, call them, and they will verbally work through the numbers with you.

I checked my notes. It was a Defiance Rebel and the "print" was for a Kelbly Atlas. It was a cone bolt so I don't think any of this helps the OP (unless Kelbly Atlas flat bolt actions are the same).

Custom Rifle Actions | The Atlas Action

Shop Actions Steel Atlas at Kelbly.com – precision-crafted rifle actions built for accuracy and performance. Explore specs and order yours today!

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[Alex Wheeler]

Most custom actions I have worked with have been pretty good on holding headspace. But I have found a few out enough to have them replaced. Bolt cone is also pretty good. Thread pitch diameter can vary quite a bit. Many actions dont hold thread timing consistent so you cant time the barrel or know where the engraving will end up without having the action once. At the end of the day, its your ass if theres a problem. I have seen enough in this business get past QC that I have little trust.

 

[rijndael]

Many actions dont hold thread timing consistent so you cant time the barrel or know where the engraving will end up without having the action once.

I know this was a complaint against Defiance. They made some change in 2021 to be more consistent on thread timing, but I don't know the details.

 

[Alex Wheeler]

I know this was a complaint against Defiance. They made some change in 2021 to be more consistent on thread timing, but I don't know the details.

It was not a complaint from me, theres a lot of actions that dont control thread timing. It sure makes it easier when they do though.

 

[xr650rRider]

Here is measurements I got on a Defiance Tenacity LA. Can't say yours would be the same. The mini M16 extractor seemed to work fine with clearance listed.

 

[INTJ]

Here is measurements I got on a Defiance Tenacity LA. Can't say yours would be the same. The mini M16 extractor seemed to work fine with clearance listed.

Thanks for the drawing and especially the updated worksheet for yucky protruding bolt nose actions. I am having to chamber way more of those than I like. I am a conehead/flat face kind of guy. My measurements of the Tenacity I have are a bit different.

A = .966
B= .966
C = .816

Bolt Nose Dia: .698

That makes a shank of .956, a bolt nose recess of .150, and a gauge protrusion of -.010.

 

[tobnpr]

I just cant see it as a liability if their actions are held to a standard, if the barrel is made according to the print it should be right. If not, its not on them.

Exactly, it's bullshit in my opinion.
It's no different than a suppressor manufacturer saying "sorry, no print for you to work from- just figure it out".

Only thing it protects them from is if their part is out of spec

That's absolutely astonishing.

 

[hogpatrol]

Late to the party here. I chambered and owned one Anti-X action. . Same deal, emailed for tenon specs and three days later got a no can do. Used it on one DC hunt, and sold it. No experience with their other actions.