Resizing Brass for a Different Caliber

[Sky Dog]

I have an old 6.5 x 58R Sauer single shot hunting rifle. Bertram brass is the only supplier
I can find, other than custom made. I have heard that 9.3 x 72mm will work, once it is resized.
I tried resizing a 9.3 with the 6.5 RCBS reloading dies. Due to the case size difference, it barely went in the sizing die. don't want to get the case stuck, or ruin the dies. Is there an intermediate step I need to do? Heat the brass, or step it down with another caliber?

 

[243winxb]

Forming dies?? From 30-30 ?? http://www.huntingtons.com/dies_caseform.html

New for sale -https://www.huntingtons.com/store/product.php?productid=17112





When looking at Steves, looks like a lot of brass to move using the 9.3
http://stevespages.com/eurosportrifcart.html

 

[edwardware]

I'm unfamiliar with the two calibers you're working with, but I have done some resizing. Based on my experience with .30-06 -> .270 (and reverse) and .223 -> .222 I can say:
1) Get good lube, I suggest lanolin.
2) Annealing the parts of the parent case that will be resized will reduce resizing force.
3) For a first pass, remove the decapping stem from your FL die. This will reduce extraction force, and simplify punching the brass out if you don't use enough lube.
4) You can't damage a steel die with a brass case. You might break an aluminum press, but not the die.
5) If resizing force is especially high, the stupid high-primer relief cut in most shellholders might leave an impression in the head of the reformed case. Use more lube, and/or buy a Redding shellholder without the high-primer relief cut.

 

[243winxb]

resized

Need a Rock Chucker or other strong press. And the perfect lube. Maybe anneal the 9.3 first??


The 9.3 x 72mmR☆ and the 9.3x72R Sauer are close. If one can be made from 30-30☆ why not the 6.5 Sauer also? The " base diameter" of the 9.3s would seem to make the biggest difference. Case length is close.

58mm down from 72mm, trim before sizing?

 

[243winxb]

Size a 30-30 in the 6.5 x 58R full length sizing die. See what come out.

 

[Sky Dog]

Good advise guys. I'll refocus my efforts. I'm using a Rock Chucker. One big problem with this cartridge is the rim thickness. My father used 32-40 Winchester and had the rim lathed. I'm hoping to resolve that by using the 9.3.

 

[Jenrick]

Not familiar with the cases in question, but an intermediate die that is halfway between the two can make the process much smoother.
-Jenrick