7X57 Mauser brass

[Buckeye Bill]

Hello,

Today I am starting to reload for my No.1 A model in 7.x57.

I am using Lee dies and they came with #2 shell holder.

I was working my way through the 65 pieces of brass when I had a piece of brass that would not slide into the shell holder.

I take a look at the head stamp and it is Hornady.

As I work through the rest I find 8 more that will not seat in the shell holder.

All Hornady.....

What gives?

Bill

 

[WIL TERRY]

THEY are at the outside of SAAMI O.D. specifications on the rim.

 

[Buckeye Bill]

I agree!

In my supply of stuff I found a, (still in the package) RCBS shell holder #3 09203 that is clearly labeled 7X57 Mauser. The Hornady brass will not seat.

I opened up my Lee 6.5X55 dies and found a shell holder labeled #3 and it works. :?

Only the Hornady brass is doing this.

On close inspection it appears that the extraction groove is shaped differently on the Hornady brass.

Bill

 

[Mobuck]

I've seen this with foreign brass but normally use Remington or WW w/o difficulty.

 

[mrbumps]

I had some once fired Hornady brass and found the same thing.

 

[Rick Courtright]

Hi, Bill

Dunno if you already have enough brass in that caliber, but if you don't, Graf's seems to have some PRVI in stock right now at a reasonable price (they also show Remington at a rather high one, and Norma and Nosler at what I'd consider an outrageous tariff!) That's the Serbian stuff. I've used it in a couple of milsurp calibers, and while it's not the prettiest stuff out there, it's worked quite nicely so far.

Rick C