Rock Chucker

N

njsportsman

New member
I bought a Rock Chucker with the intention of eventually getting the piggyback but, now that I'm ready I see they are discontinued. Does RCBS make an alternative? Thanks
 
I bought a Rock Chucker with the intention of eventually getting the piggyback but,

I went back and read your post again; you did not say you ‘just’ bought a Rock Chucker so I wonder how long has it been since you purchased your press. I have two Piggy Back11 attachments. Let me know what you plan to load. The shell plates that fit the Piggy Back press also fit the Pro 2000. I will have to determine how many shell plates I have two of.

The Piggy Back will not ammo that is taller than the 223.

F. Guffey
 
F. Guffy, there aren't many of us who use the old Piggyback conversion these days I think. I've had mine since sometime in the eighties, and these days just leave it set up on my Rockchucker for 38/357 loads only. I don't like hauling it out to re-set, after a couple years of forgetting how it all works. The Piggyback ain't the progressive for the kind of guy who isn't careful. :rolleyes:

I saw a complete PB kit at our last local show for sumpthin like 50 bucks awhile back. Almost picked it up for -- parts and pieces that may become unavailable. jd
 
I have the Piggyback IV on my Rockchucker, good for use if you deprime & resize in one operation then prime, charge powder & seat in the second. If you try to do it all in one operation the crud from depriming will foul the primer strip feed hopelessly. I think that's why RCBS dumped the primer strip feed system on their new progressive press.
 
Short answer: No.


Longer answer: No. They discontinued the Piggy Back conversions with the introduction of their new progressive press.

It shouldn't be terribly difficult to find one on various auction sites, though.
 
I have the Piggyback IV on my Rockchucker, good for use if you deprime & resize in one operation then prime, charge powder & seat in the second. If you try to do it all in one operation the crud from depriming will foul the primer strip feed hopelessly. I think that's why RCBS dumped the primer strip feed system on their new progressive press.
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Another example of how unfair life is. RCBS never offered me a strip primer system for my Piggy back 11 presses. They did not mention a strip loader in their literature.

But; they did install the strip loader on the Pro 2000. I had to read about the strip loader from R. Lee.

F. Guffey
 
F. Guffy, there aren't many of us who use the old Piggyback conversion these days I think. I've had mine since sometime in the eighties, and these days just leave it set up on my Rockchucker for 38/357 loads only. I don't like hauling it out to re-set, after a couple years of forgetting how it all works. The Piggyback ain't the progressive for the kind of guy who isn't careful.

I saw a complete PB kit at our last local show for sumpthin like 50 bucks awhile back. Almost picked it up for -- parts and pieces that may become unavailable. Jd
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I do not have that problem, I have 4 Rock Chuckers. I am the only reloader in the world with Rock Chuckers that do not cam over. And: I am the only reloader in the world that understands why the Rock Chucker was designed not to cam over.

I have no ideal what rational a reloader uses when making a decision. The Uniflow Powder measure is worth $50.00. One shell plate is worth $20.00. And then there is the case activated powder measuring system. I have two with spare parts. If the Piggy Back press is an earlier version it will not have the case activated lock out meaning no case no powder. Many of the earlier presses were modified.

F. Guffey
 
I dont have much bad to say about the piggy back. I just gave mine to my uncle last week. I used it for several years and ran many thousands of rounds thru it.
When you get a feel for it and get in a rythum, its a pretty decent press.
I really like the fact that it only takes about 2 minutes to switch back to a single stage press.

I ended up getting a screaming deal on a new 650 Dillon from a friend last spring and switched all my pistols over to that instead. Now THATS a nice press but a little on the spendy side.:)
 
F. Guffey I'm sorry to tell you that you're not the only reloader that doesn't cam over on their Rockchucker. I also don't as I set my dies up not too.
 
F. Guffey I'm sorry to tell you that you're not the only reloader that doesn't cam over on their Rockchucker. I also don't as I set my dies up not too.
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Forgive, never my intent to confuse. I should have said I have 4 Rock Chucker presses; two of them are mounted to Piggy Back 11 presses. Then I meant to say I do not have a Rock Chucker press that cams over. I meant to say I have at least 10 presses that cam over by design; and then I meant to say, by design, my Rock Chucker presses do not cam over.

When I encounter cases that have the ability to resist sizing I can shove the top of the press up and bottom down, I can also determine the amount of strain in thousandths.

F. Guffey
 
I also have vise grip plyers. My vise grips do not cam over, by design the manufacturer claimed they discovered the 'leaver lock'. Not to be confused with the 'leaver policy'. When I find an ugly rifle that is accurate I 'leaver the way I founder'.

F. Guffey
 
I am the only reloader in the world with Rock Chuckers that do not cam over. And: I am the only reloader in the world that understands why the Rock Chucker was designed not to cam over.
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Not the only one. You are one of the few reloaders that know what the term cam over means. It has nothing to do with how the dies are set. Many think that if die is set low enough for the ram to put pressure on the die that is a cam over. That is not called a cam over. A cam over can only occur if the ram reaches it’s highest point and then goes down a small amount before the handle reaches it‘s lowest point. It is in fact impossible for my Rock Chucker Supreme to cam over, because it has stop tabs to prevent it.
 
54 Guns, A member of a reloading forum reported me to RCBS. He informed them I said my Rock Chucker did not cam over. It was about that time the technical person at RCBS instructed the forum member to have me call him; he included a phone number, extension and name. To check a press for its ability to cam over by a reloader must take their hands out of their pockets and push themselves away from the from the key board.

So, it is easier for me to perceive the world as being unfair, I am the only reloader that has Rockl Chuckers that do not cam over than it is to convince other reloaders their Rock Chucker presses do not cam over.

Then it gets very complicated.

F. Guffey
 
I have an old Rock Chucker RCII, a new Rock Chucker Supreme, and a recent Lee Classic Turret. None of the three cam over. All three feature dual linkage arms with top pivots on the centerline of the ram. The only way they could cam over would be for the dual linkage arms to pass through the perfectly vertical position. All three presses have stops that prevent the dual linkage arms to move beyond vertical, thus preventing cam over. It's a very effective way to produce a press with very high mechanical advantage at the top of the stroke.
 
Not the only one. You are one of the few reloaders that know what the term cam over means.
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That's a subject that I've given up on, on these forums.

As you (and other posters) have said, people just don't understand what it actually means, and can't comprehend when we try to explain it.

So, it's easier to just ignore the subject and move on to something else.

But, I will add, for the record: Rock Chuckers do not cam over, unless they've been modified or broken.
 
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That's a subject that I've given up on, on these forums.

As you (and other posters have said), people just don't understand what it actually means, and can't comprehend when we try to explain it.

So, it's easier to just ignore the subject and move on to something else.
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That is to bad, because I thought we were here to learn from each other. But I understand your point. Moving on.
 
That is too bad, because I thought we were here to learn from each other. But I understand your point.
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I do not agree with FrankenMauser point. I do agree with T. O'Heir when he says the case does not have head space.

I have instructions from RCBS that cover presses. One set of instructions for presses cover the cam over press; I have another set of instructions that cover non cam over presses. In the big inning the cam over press was referred to as being ’a bump press’. Because; the cam over press bumped the shell holder against the sizing die twice, once on the way up and again when the ram was lowered. And now everything is ‘bump’. I find it most difficult to bump the shoulder back; more times than not the shoulder on my cases do not move when sizing and there is a big chance the shoulder on my cases do not move when fired.

F. Guffey
 
That is to bad, because I thought we were here to learn from each other. But I understand your point. Moving on.
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There are plenty of other members here (with new ones coming through regularly) that take up the slack.

I have just chosen to not participate in certain discussions, after 8 years and 8,000+ posts revealed that there are certain things that nearly always remain unresolved, no matter who chooses to take part in the discussion or how clearly they try to explain something.
If you spend much time here, you'll find that I am not alone in that approach. Each moderator has their own 'type' of threads they participate in, as well as types of threads you never see them post in - unless they're closing one that got out of hand. And other 'frequent flyers' tend to avoid certain types of discussions, even if they're quite experienced (or even a subject matter expert).
 
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