Sizing die as crimp die question

[rdlange]

I've read you can use the sizing die as a taper crimp die... straight cases.  Is this for real?  How does it work?  Assume I remove the depriming stem...

Thanks.

[sidewinder319]

I use a FL die to crimp my 45-110 cases just enough to keep the bullet from falling out. You must be careful or you will reduce the size of you lead bullets.  This can cause key holes and poor groups.  

[Ranch13]

It depends on how tight the size die resizes the cases. I have a Hornady 45-70 size die that sizes the cases down so far I can't seat a .451 diameter patched bullet , but I have a Lyman die that sizes them down to where that same patched bullet just barely slides in. I do on occasion use that Lyman die when loading patched bullets after the case is charged and primed ,but most of the time I resize first then don't worry about a crimp.
 

[necchi]

Uhm,
The seating die is used for crimping,,
The sizing die for bottle necks don't have room for the bullet even if the sizing ball stem is removed??

[Grumulkin]

I've read you can use the sizing die as a taper crimp die... straight cases.  Is this for real?  How does it work?  Assume I remove the depriming stem...

Thanks.

I see no reason you couldn't do that but why when you can do the same thing while simultaneously seating a bullet with your seating die?


Yes, you would have to remove the deprimeing stem.

[Ranch13]

Necchi, he's asking about straightwall cases.....

[necchi]

Oop's,,

[SHOOTALL]

I've read you can use the sizing die as a taper crimp die... straight cases.  Is this for real?  How does it work?  Assume I remove the depriming stem...

Thanks.

I see no reason you couldn't do that but why when you can do the same thing while simultaneously seating a bullet with your seating die?


Yes, you would have to remove the deprimeing stem.

or use seating die to seat bullet , back off seater then crimp in a seperate operation as to not mess up lead bullets

[anachronism]

Except for the fact that a straightwall sizer isn't tapered, which negates the utility of using it as a taper crimp die. All it will do is swage the bullet in the case to a smaller diameter in a straight line. 9mms, with their extremely tapered cases might be an exception, but then there's not really enough angle to the taper to do you much good. Taper crimping only prevents bullets from being pushed back in the case during an autoloaders cycling. It's worthless for revolvers which normally require a roll crimp to prevent the bullets in a cylinder from backing out of the case due to inertia. Also, slower powders require a higher degree of resistance (bullet "pull") for consistent ignition. I've heard of some guys claiming that taper crimping wadcutters with fast powders makes the load more uniform, but I'm a roll crimp guy when it comes to revolvers. Since the die sets have a crimping die anyway, why not use it?

[SHOOTALL]

I find the profile crimp die to work best on revolver cart. Mine come from Redding and have worked well for 20 years. A roll crimp can allow small amounts of movement back and forth . A profile crimp when applied correctly locks the bullet in place better. It does however require better case prep and in most cases the use of same brand cases for each run.

[gypsyman]

I have friends that used the sizing die for crimping. But, is was on single shots, not revolvers or semi autos. I'm with Shootall. I use the Redding profile crimp on my big bore revolvers. And, stick with taper crimp for the semi-autos. gypsyman

[Lloyd Smale]

best way ive found to do it is to buy a second seating die and take the seating plug out of it and use it only to crimp in a seperate operation from the seating of the bullet. that way your not sizing down your bullet like a lee factory crimp die does.

[anachronism]

You can fix a LEE FCD. Remove the guts from it and screw it in the press, then heat the bottom of it with a small torch to defeat whatever locking compound they use, then drive the accursed sizing ring out from the top with a punch and hammer. After it cools back down, reassemble, and use normally.