Need For Extra The Profile Crimp Die
- Thread starter Tamitch
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Crashbox
Member
It is not necessary per se to purchase the Redding Profile Crimp Die in addition to a three-die set, but in my opinion you won't be sorry if you do get them- they are fantastic. I use them all the time on my .357 loads and they just plain work very well.
forestswin
Member
Crash
I just picked one up last week on a whim for 357. I heard they are very good. I can see they give a partial taper crimp, then a roll crimp. But why are they good or better than standard crimp dies? I've only used it on 30 rounds so far. I was hoping to find someone who uses one that would be able to give some explanation of their benefit.
I just picked one up last week on a whim for 357. I heard they are very good. I can see they give a partial taper crimp, then a roll crimp. But why are they good or better than standard crimp dies? I've only used it on 30 rounds so far. I was hoping to find someone who uses one that would be able to give some explanation of their benefit.
Crashbox
Member
I find it very tough to explain. They seem to work well with cast bullets too, even though one would think the die would swage the bullet down and thus adversely affect its accuracy. They are a unique breed.
Honestly, the best answer I can give is that they just plain work. Sorry about that.
Honestly, the best answer I can give is that they just plain work. Sorry about that.
The seater die included in the the three die set will have a crimp ring machined into it so that you can seat and crimp in the same step.
Current manufactured Redding seater dies may have the profile crimp ring machined in them, but I do not know that for sure. Check at Redding.
Lots of people do and make excellent ammunition.
I prefer to crimp in a separate step from seating, my idiosyncrasy and been doing it for decades. The Redding die is a good option for that purpose.
They are very nice, and setting up seating and crimping in separate steps is easier than doing it together, but that isn't hard by any means. As long as the bullet has a good cannelure or crimp groove (Lead), you can seat and crimp in one step easily.
http://www.thehighroad.org/showpost.php?p=7699828&postcount=14
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http://www.thehighroad.org/showpost.php?p=7699828&postcount=14
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Dillon did research, in there effort they decided crimping while the bullet was being seated was a conflict, as soon as the crimp folded into the bullet the case below the mouth expanded, because of the conflict they decided the case below the crimp could bulge. They decided the bulge could lesson bullet hold.
Lyman decided the same thing when recommending to crimp and or not to crimp, they decided if the procedure was not done correctly crimping could do more harm than good. roll crimp and or tapper crimp was necessary for pistol straight wall cases.
Redding profile crimp die: The instructions that come with the die says “lightly lube the case’'. Then there is the profile as in identifying the die as being different, it is a crimp die but I have to wonder what profile has to do with crimping.
I have two pistols that like new ammo, I can run my reloads through a carbide full length sizer die after crimping, I am not required to lube the carbide die, if I used a standard full length sizer die, I would be required to lightly lube the the cases. Is it possible I have been crimping first and by running my cases through a full length sizer die to uniform the profile of my reloaded ammo? Redding also has a die identified as a shoulder bump die, it is not possible to bump the shoulder without case body support. Point? I decided I did not need a bump die because it was a full length sizer die with a loose neck.
F. Guffey
Lyman decided the same thing when recommending to crimp and or not to crimp, they decided if the procedure was not done correctly crimping could do more harm than good. roll crimp and or tapper crimp was necessary for pistol straight wall cases.
Redding profile crimp die: The instructions that come with the die says “lightly lube the case’'. Then there is the profile as in identifying the die as being different, it is a crimp die but I have to wonder what profile has to do with crimping.
I have two pistols that like new ammo, I can run my reloads through a carbide full length sizer die after crimping, I am not required to lube the carbide die, if I used a standard full length sizer die, I would be required to lightly lube the the cases. Is it possible I have been crimping first and by running my cases through a full length sizer die to uniform the profile of my reloaded ammo? Redding also has a die identified as a shoulder bump die, it is not possible to bump the shoulder without case body support. Point? I decided I did not need a bump die because it was a full length sizer die with a loose neck.
F. Guffey
James2
Member
I don't see any problem with crimping and seating in one operation as long as there is a crimp groove and you don't overdo it. The crimp ring just folds the brass into the ring without actually smashing it into the bullet. If you overdo the crimp and it actually smashes into the bullet, then there is an increased chance of bulging the brass below the crimp.
I have not used a profile crimp die, but am assuming that it has a sizing ring in it which would hold the brass from bulging as the crimp is made? Sounds good in theory, but consider that all brass is not the same thickness and on thicker brass you may get some bullet sizing too?
I certainly do not want to size down my cast bullets.
Hey, it is a simple matter to measure a brass just before crimp and after crimp to see what is happening.
I have not used a profile crimp die, but am assuming that it has a sizing ring in it which would hold the brass from bulging as the crimp is made? Sounds good in theory, but consider that all brass is not the same thickness and on thicker brass you may get some bullet sizing too?
I certainly do not want to size down my cast bullets.
Hey, it is a simple matter to measure a brass just before crimp and after crimp to see what is happening.
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