Reloading Hornady Superformance cases ???

[roggom]

Picked up a Winchester in 7x57 this year. Been loading this cartridge for years, but most was RP, FC and PPU. Picked up a box of Hornady Superformance (1) to see what all the hype was about, (2) to have decent brass to reload.

It did shoot decent out of my Model 70, but when I went to reload the emptys, the case would not fit in the shell holder. Kinda freaked in thinking I had some serious pressure issues. Pulled out a fresh round and it would not fit either. Cases measure .470 at the case head and feed flawlessly.

Found that the case "groove" between the head and body was .416 vs .403-.405 of all the other brand cases.

Anyone else seen this with any of the Superformance ammo?

This was the 7x57 139 GMX #81556

Wondering if this was done intentionally so as to render the case non-relaodable?

Either way, I had to bust out the Lee Loader... tapity tap tap.

 

[BirdEyes]

If you are using RCBS shell holders, you need a #11, not a #3.

 

[roggom]

Thanks, I will have to pick one up, I have the Lee 2 and Redding 1. Been using them on all of my 7x57 and 8x57 in the past. Wonder if Hornady is just making the extractor groove a little beefier. SAAMI is .409 on that spec.


http://www.saami.org/pubresources/cc_drawings/Rifle/7mm Mauser.pdf

 

[roggom]

Picked up the #11 RCBS and it worked, thanks. Also the #10 Lee works for the Auto Prime. Pretty much any shell holder designed for the 220 Swift.

 

[BirdEyes]

Glad it worked for you. there seems to be two sets of specifications for this particular brass depending on vendor. The one you ended up with is also required on others particularly those with a European lineage. There are other threads posted about it which you can google if interested.