mcivor_dan
mcivor_dan
2 posts
Joined February 2015

357 sig backup die

The "F" backup die on my 1050 expands the case neck too much for loading 357 sig.

I can't get any tension on the bullet when it is wound all the way down so the swage can work correctly.

Is the "S" expander the only one with a smaller diameter? Will this reach the bottom of the 357 sig case?

If not, is there any recommendation you can provide?

Thanks,
Dan
dillon
Administrator
dillon
2,945 posts
Joined July 2007

RE: 357 sig backup die

We are not familiar with any 357 SIG brass that requires swaging.
That said, you can use the 223 swage backup die assembly as well as the 30 M1 Carbine backup die to hold the case down at the swaging station.
mcivor_dan
mcivor_dan
2 posts
Joined February 2015

RE: 357 sig backup die

Thank you for the quick reply. I will place an order for the 223 backup rod.

I use an autodrive and one of the sensors replaces the swaging rod. For this caliber it is more to catch un-deprimed cases than it is for swaging.