Lee factory Crimp Die

[polmar]

Er med en sånn en i die-settet til 243 win. Hva brukes den til og når ?

[Stefflus]

Den brukes til å krympe fast kula, hvis/når det skulle være nødvendig. Nødvendigheten bestemmes i hovedsak av hvor heftig rekylen er i det aktuelle kaliberet. 223Rem krymper jeg nesten aldri. 338WM krymper jeg som regel, med mindre jeg skal teste og kan skyte ett skudd av gangen på bane .

[oglan]

Hvor mye skal man krympe?

[Morgan Cane]

Hvor mye skal man krympe?

 

Fra Lee sin hjemmeside:

 

Factory crimp die adjustment

 

The amount of crimp applied will be consistent if your press has mechanical stops built into the lever linkage, and you lower the lever to the stop every time. Start with the Factory Crimp die turned into the press until it stops against the shell holder with the ram raised all the way. Lower the ram, and turn the die in one full turn. Now try crimping a case, making sure that you raise the ram (lower the lever) all the way to the stop. You will feel slight resistance at the top of the stroke, as the crimp collet is forced up into the die body.

 

If the crimp is not firm enough, turn the die in another 1/4 turn and try again. If you turn the die in to the point where the four slits in the collet are closed when the ram is raised all the way, you have reached the limit.

 

http://www.leeprecision.com/cgi/catalog ... crimp.html

 

 

Factory Crimp die advantages

 

The Factory crimp die can be a useful addition to your reloading process. It not only ensures that the bullet will not be pushed back into the case, but it can also duplicate the effect of seating the bullet out to nearly touch the rifling. The initial resistance to overcome the crimp is nearly the same as that which is required to start a bullet seated out close to the rifling. This die has no provision for seating the bullet.