40/357sig size? [Archive] - Glock Talk

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10head
03-08-2011, 19:28
making a order for sig brass(starline) and a review said he used a 40 size die for the body and then a sig die for neck, i have not seen this before anybody else do this and why.

PCJim
03-08-2011, 22:30
The 357Sig case is basically a 40S&W case necked down to hold a 9mm bullet. From what I understand, only one manufacturer, Dillon, makes a 357Sig carbide resizing die and it is not cheap (I use Lee). Many reloaders use a 40S&W carbide resizing die to resize the main body of the brass without having to use a case lube, then use the 357Sig resizer for proper setback of the shoulder and to resize the mouth.

sellersm
03-08-2011, 22:45
I do what PCJim said -- size first with the 40 S&W and then again with the 357sig die. Don't need to lube the case that way.

You can do it with just the 357sig die, but you'll want to lube it a bit first.

fredj338
03-08-2011, 23:56
The 357Sig case is basically a 40S&W case necked down to hold a 9mm bullet. From what I understand, only one manufacturer, Dillon, makes a 357Sig carbide resizing die and it is not cheap (I use Lee). Many reloaders use a 40S&W carbide resizing die to resize the main body of the brass without having to use a case lube, then use the 357Sig resizer for proper setback of the shoulder and to resize the mouth.
Yep, the only way to fly is Dillon for carbides sizers. Wierd, Lee could put a carbide ring in their 357sig die just as easily as the 40. So using the 40 die is vaible, but adds a step as you must use the 357sig sizer to set the shoulder & reform the neck. It's a low pressure job at that point, no case lube needed.