6.5-06 problems

HiBC, I like the ease of using that case and necking up.
I usually anneal cases before changing their anatomy, which helps with uniformity.
Now you got me wondering about concentric and uniform neck thickness where I had not considered it.
The brass has performed nicely enough, and with that I dont go digging around for problems....but I proba ly could improve the end result if I did.......
 
I took it out of the box in 2009. My RCIV Rock Chucker has to cam over some to get a full sizing as well.
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I can tell by the responses no one knows and or understands 'CAM OVER'; I could suggest you contact RCBS but in my opinion you would be wasting your time.

There is something about 'cam over' that drives reloaders to the curb. In your statement you said; "My RCIV Rock Chucker has to cam over some to get a full sizing". the part reloaders do not understand about cam over is all of the full length sizing happens before cam over. After cam over the ram changes directions. The good part? Before the reloader can remove the case from the top of the ram the reloader must lower the ram, On a cam over press the ram must go up before it can be lowered, I know it is a mind boggling thing but the case gets full length sized twice in a cam over press.

I have three Rock Chuckers, I do not have a Rock Chucker that cams over.

F. Guffey
 
Mr. Guffey is right about that terminology. Cam-over means driving the handle past top dead center of the ram stroke like a valve cam lobe reaching peak depression of a valve and then going past it. It gives you theoretically infinite mechanical advantage as you pass through the peak position of the ram. That means it also gives you the mechanical advantage needed to damage the press, so many presses have stops on them to prevent cam-over from happening. The Lee presses all do. I don't have a Rock Chucker, but understand they do as well. My Forster Co-ax has tabs cast into it to prevent cam-over, too.

I think what most people mistakenly misuse the term "cam-over" to mean is driving the press ram past the initial point of contact with the sizing die mouth so that the press ram compresses the shell holder against the die mouth, slightly stretching the press frame like a very stiff spring. That compression ensures pushing the brass is as far into the die as shell holder deck will allow. Without at least a little of that compression—if you only screw the die in far enough to just kiss the deck of the shell holder—when you size a case, the brass insertion force also stretches the press frame a little and you can see that in the top position (handle against its cam-over-prevention stops) a crack of light is visible between the shell holder deck and the sizing die mouth. Only by turning in the die enough to make up for the press frame stretching by the brass's required insertion force into it do you get full resizing of the case. Usually 1/8 to 1/4 of a turn past the kiss point will do it on an iron press, though Lee notes needing up to 3/4 turn with their lighter aluminum frame presses. (Aluminum is easier to stretch than an equal yield strength iron casting (aluminum's modulus of elasticity is about 1/3 that of steel).
 
Mr Guffey:
That someplace you talk about does not include making this stuff up just to make it simpler. I would suggest a reloader start out with nomenclature, I would also suggest any reloader study the glossary of terms.
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Oridinarily,I would make no mention of it....your discussion of "camover" in regard to an RCBS RockChucker press.

But since you insist on proper terminology,the press does not cam over because it has no cam.

It has toggles. The term is "toggle over".

Plastic injection molding machines,for example,the German Aurburg,utilize toggles.
While mold setup is typically done similarly to the reloading press,kissoff plus a nudge.the mold press tiebars provide a specific amout of clamp at a given tie bar stretch.( Tiebars would be part of the press frame,similar to the posts on an old Behr H-press or the Co-Ax)

The proper way to set the platen for desired clamp,up to maximum,is to set up dial indicators on the ends of the tie bars to measure actual tie bar stretch.

It might be interesting to setup an indicator across the "C" or "O" of a typical press.

Remember RCBS is an acronym for "Rock Chucker Bullet Swage" The Rock Chucker is over built to use bullet swage dies. That's why threaded bushing is in the top.of the press. Pull that out,and Corbin swage dies screw in.

I have a massive old Lyman "C" press with the same bushing that is built to swage.

The swaging presses should not be challenged by resizing operations.
 
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I think what most people mistakenly misuse the term "cam-over"
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It was not RCBS, in the beginning they said they had a press that cammed over and they said they had a press that did not cam over. The problem was with reloaders, they could no get their hands out of their pockets, after that there is this thing with being lazy; to determine cam over is to determine how much cam over the press had. Before RCBS was a company that made plyers, some folks call the plyers vise grips, the company that owns the design called the design leaver lock. And then there was another tool that secured heavy loads like drill pipe to a truck bed; The slang name for that tool is boomer. Nothing funny about it, the leaver had to be secured because it was another leaver lock mechanism.

And then there is 'bump', if the press is a cam over press it is a bump press. If the press is not a cam over press it is not a bump press; I suggest reloaders read the instructions.

F. Guffey
 
I don't have a Rock Chucker, but understand they do as well.
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Again, all a reloader has to do is remove the die from the press and then lower the handle whole looking down at the top of the ram from above. When the ram reaches the top it does not stop and change directions, instead the ram is kicked forward because the linkage goes into a bind at the bottom, the bind causes the ram to be kicked backwards at the bottom.

I know, there are reloaders that do not believe that is fair, they want to know what keeps the ram straight when sizing a case; and I say again, the case keeps the ram straight, the case guides the ram straight up. I have asked if there is a reloader that knows how thick a case head is when measured from the cup above the web to the case head; I get two answers, one is 'no answer' or just simply 'NO'.

I have a few 30/06 cases with case head thicknesses of .260", those are my favorite cases, the 2nd most favorites 30/06 cases are the cases that are too long from the shoulder to the case head to allow the bolt to clowe.

F. Guffey
 
And then? One day I decided I did not like the ideal of my Rock Chucker parts banging into each other so I took a few files and fixed-it. I fixed my Rock Chucker. I removed enough metal from the linkage to allow the ram to cam over, I knowm there are reloaders that are reading this that are getting dizzy and about to pass out.

The dizzy ones do not understand I am the reloader that adjust the die to the shell holder, I can adjust the die to the shell holder without the linkage getting tangled up and then there is the 'bump twice' thing, I understand 'bump' and it has nothing to do with moving the shoulder back:eek:

F. Guffey
 
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