Profile Crimp Die

Notes:

This die applies a roll crimp to rimmed pistol cases.

THESE DIES ARE NOT FOR CARTRIDGES THAT HEAD-SPACE ON THE CASE MOUTH.
What does that mean? These dies are not for cartridges that Head-space on the case mouth?

Robert

Some cartridges, generaly straight walled rimless cartridges (45 ACP etc), head space on the case mouth. Ie it is the case mouth which stops the cartridge from going too far forward esp when the fireing pin hits. A roll crimp will allow such cartidges to chamber too deeply and not be set off by the fireing pin.

Basicly they are telling you to use the dies only on rimed cases which headspace on the rim.

Just to add a little more to Aussie's explanation, bottlenecked cartriges head space on the shoulder, or "belted" magnum shells head space on the belt. And as he said, the .45 ACPs, 9mm Lugers, 10MMs and such use the mouth of the case to stop it from slipping down the barrel. Note that these a mostly pistol rounds. The correct headspace is also very important in how the breech locks up and again as Aussie said, for ignition when the firing pin whacks in the primer. What flavor of cartridge were you planning to use these dies on anyway? Am sure you'll get good advice here.

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44 MAG. Gun = Ruger supper red hawk.
So I'm taking that this die will work on this, and a lever action?

Yes.

Marlin...

The general rule is...
Roll Crimp = Revolvers (rimmed)
Taper Crimp = Semi-Auto (rimless)

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Michael

you guys are the best! Thanks!!

Not to be a butt, but it is obvious that you have not read any reloading manuals. Go get your Lyman, Hornady, Sierra, Hodgdon...manual, not the yearly flier or supplement, and read it. Every one of the manuals above explain headspace in more detail than space allows here and the different case shapes and how those shapes affect headspacing. Too many reloaders get their manuals (if they get them at all, many just download recipes off the net) and then use them as cook-books. Read the darned thing and you will learn a lot, and you will become a much better, and SAFER reloader. I hate to preach, but not knowing what headspace is serious, and one MUST know what is going on with the ammo they load or they are taking unnecessary chances, not only with himself but with the people around them.

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Easy there Big Bore... You are right about the manuals but some of the stuff is confusing to a new guy and he is doing the right thing to ask questions when in doubt. Really, his question was concering the wording associated with the die and the type of crimp that die delivers.

Michael

No doubt about it, if one does not understand something one should ask. As I said, I was not trying to rag on him, but I cannot count the number of times that I have been asked to teach new people to reload. I always start the same way. Buy a manual, read it, and when you understand the mechanics of what we are going to do, then I will come and we will walk through it together. Time and time again I get a call, all ready to load, I get there, and they have not read the first word in the manual. That becomes painfully obvious when they point to the maximum load and want to START there, or have purchased large pistol primers for loading a cartridge that uses small rifle. NO, a primer is NOT a primer. I even had one guy want to know why he needed the scale, he wanted to just fill the case full of powder and seat the bullet. Now, tell me HE read even one word of the manual. I lose it about then.

That was really the point I wanted to make, PLEASE, read the manuals. They are so full of information that you are only doing yourself a disservice by not reading them. I know, it takes time and people want to do, not read, but please, please, please, read those manuals. The eyes you save may likely be your own.

If I came across too harshly before, I do apologize as the last thing I would want to happen is someone NOT ask a question when they should. That would be about the worst mistake one can make.

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Big-Bore...

As always, quite eloquent in reply with very good points for the fellow new to reloading to consider. Thanks for all the help you offer on this forum!

Michael

Good book - ABCs of Reloading. Stop by the library, or any decent bookstore.

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MikeG

Thanks for the information> I just didn't know what THESE DIES ARE NOT FOR CARTRIDGES THAT HEAD-SPACE ON THE CASE MOUTH ment at all.
And I do read all the manuals that I have. And I don't start with the maxumum load in the books . I love to reaload! And I understand where you are coming from Big Bore, there are a lot of ingorant people out there. But they need to be taught the right way before they hurt them selves and others.
I would like to be taught, and see if I'm doing this the right way or the wrong way. That's why I bounce things on this board. Not to sound stupid on things like this. But I didnt know.

Keep asking, M480R - that's what we do best here, answer questions. Keep'um coming.

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"Firearms only have two enemies - rust and politicans" author unknown

I thought the warning was very confusing, why have a warning on dies for a rimed cartridge saying not to use them on a rimless.

Good question.

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What is the cartridge? Many of the older Brit cartridges came in both rimmed and rimless versions. The rimless was intended for magazine rifles and the rimmed for singleshot or double rifles. Quite often there was a difference in case size, though the caliber remained constant. There are two 300 H&H's one belted rimless and the other flanged or rimmed. Similarly, the 375 H&H, the 350 Rigby, the 275 Rigby, etc... all have rimmed cousins. Case size is a bit different and if you tried using one on the other, you might end up resizing the case inappropriately for the firearm and have undesireable results.

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The cartridge is .44 mag.

The problem is headspacing.

After a little research I have discovered a .44 auto mag which I have never heard of before. I would assume that it is rimless and that the dies for .44 rem mag could be used on the .44 auto mag which could result in problems if the crimping feature was used.

You just hit the bullseye. The .44 Automag is identical to the .44 Magnum except for the rim. It looks like the Automag does headspace on the case mouth.

Bye
Jack

The 44 mag. is a rimed cartridge and head spaces off the rim of the cartridge. That is way it is safe to use 44 spl. cases in them.

My Lee Factory crimp die for 44 mag is a roll crimp die, my 45ACP Lee factory crimp die applys a taper crimp.
I'm betting the Redding is the same way, cartridge dependant.
Humpty

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