Model 700 stiff bolt action

I believe what Al is asking is this . . . . Does your case break loose from the chamber by bumping the bolt upward or when bumping the bolt rearward? (The case is supposed to cam lose during bolt lift.) I agree that the rear of the chamber may be too tight.

- Innovative
 
If a person were to open up

the butt end of their chamber, how far into it should they open it up? I question .005 as being ideal. That is a LOT of size to have to squeeze every time one re-sizes and may hasten hard cases, I am thinking. I would think .003 might be the limit.
 
Pete Wass said:
the butt end of their chamber, how far into it should they open it up? I question .005 as being ideal. That is a LOT of size to have to squeeze every time one re-sizes and may hasten hard cases, I am thinking. I would think .003 might be the limit.
Click to expand...

Pete, this would be true if one were to try to rely on factory sizing dies. I can't see this possibility as feasible since dies vary in diameter.



I open mine up .007 to .009 over virgin brass....... I never have hard extraction or a click. You can perty much make the chamber any size you want as long as your dies fit..... Your brass does blow out the first firing but you don't work it, you have dies built to fit.

al
 
That's what I'm thinking too Al

alinwa said:
Starting to sound like your chamber's too tight at the base. IMO it should be at least 5 thou fatter than your brass at the web. Do you heel it open from the bottom of the stroke? Or just have to pop it at the top, when the extraction cam engages.......?al
Click to expand...

Geraci asked me to bring it to him so he can gauge it and see what's going on.

(PEI Rob) You are absolutely correct and I apologize to all and especially Model14. I didn't expect this to snowball as it did. I'm very sorry.

Roy
 
When bumping the bolt upward

Larry Willis said:
I believe what Al is asking is this . . . . Does your case break loose from the chamber by bumping the bolt upward or when bumping the bolt rearward? (The case is supposed to cam lose during bolt lift.) I agree that the rear of the chamber may be too tight. - Innovative
Click to expand...

Once the case breaks loose it comes back ok. I think, as Al stated, that my chamber may be too tight at the base.

Roy
 
I guess I'm not getting this

alinwa said:
Pete, this would be true if one were to try to rely on factory sizing dies. I can't see this possibility as feasible since dies vary in diameter.



I open mine up .007 to .009 over virgin brass....... I never have hard extraction or a click. You can perty much make the chamber any size you want as long as your dies fit..... Your brass does blow out the first firing but you don't work it, you have dies built to fit.

al
Click to expand...

If a person goes with a big chamber like that one, say .005 over std, what size die does one make? I know in my situation I have a Jones die that I have had to send back to be re-made because the reamer cut a tight hole for some reason. Even doing that, the Lapua brass is still sticky, both in the die and the chamber; more-so in the die. Are you saying that the brass will not grow to the full .005 when fired? I don't see any point of opening it up otherwise. In the past I have shot some overloads in various chambers by mistake and the brass butts grew to fill the chamber so that they would no longer fit into a shell holder. Does one go up to the next size shell holder?
 
I noticed

on a post here where in a fellow showed pictures of an action he was making, he spoke of cutting a helix for the bolt cam to work on. I think there may have been a picture of it but didn't get a grasp of the "pernt" as Archie bunker use to say, of the helix. I know there must be one and if so, why don't the custom makers or all makers, for that matter, cut the helix?
 
Pete Wass said:
If a person goes with a big chamber like that one, say .005 over std, what size die does one make? I know in my situation I have a Jones die that I have had to send back to be re-made because the reamer cut a tight hole for some reason. Even doing that, the Lapua brass is still sticky, both in the die and the chamber; more-so in the die. Are you saying that the brass will not grow to the full .005 when fired? I don't see any point of opening it up otherwise. In the past I have shot some overloads in various chambers by mistake and the brass butts grew to fill the chamber so that they would no longer fit into a shell holder. Does one go up to the next size shell holder?
Click to expand...

Pete,

Yes the BODY of the case will expand the full .005 but the head won't. If the head is expanding you're loading too hot, YOU CANNOT CONTAIN THE CASEHEAD!!! Nothing will stop the casehead from expanding, even a tight boltface will only trap the case, not keep it contained.

By the same token, a casehead WILL NOT SPRING BACK nor can it be swaged back. The only way to keep the casehead small is to shoot lighter loads. This casehead expansion is what's responsible for loosening primer pockets. Nothing will stop it.

Yes, I've fought this with every reamer-maker and die-maker and even gunsmith I've used...... including Neil. Sometimes ya' just gotta' tell 'em what you want and move forward. Neil's dies have changed dramatically since I got my first one ;) And I've paid good money for crap systems, had to buy dies for rifles with supposedly fitted and balanced chambers/dies. I've currently got several barrels with too-tight "Min SAAMI" chambers, they SUCK!! I can't even use 'em up because they suck so bad to load for. I plan to rechamber them all.

But the industry's learning........ dies are getting better.

And chambers are getting bigger!! :D

al
 
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