Der Ami,
Thank you. I shoot 360EX and a 9.3x57R/360 (only difference is the 360EX has a thinner rim).
For the 360EX, I use 22 gr of IMR 4198 and bullets between 158 gr and 180 gr. My Lancaster likes 0.359" - 360" 158 gr cast bullets and my Henry likes 0.367" 177gr HC bullets and 180 gr HC GC bullets. My Reilly 9.3x57R has some mispires when I use thin rim brass. Buffalo Arms used to have 9.3x57R brass with a 0.060" rim but have been out of stock for over 2 years.
My DR which I now believe is a 9.3x58.5r S&S has a 0.355" bore and should shoot 0.356" HC GC bullets. I have some 180 gr HC GC bullets that I will swage to 0.356" and load with 22 gr IMR 4198 and see how it shoots. The brass was cut down 9.3x72R brass that had the neck area reduced in 8x58.5r S&S dies, annealed, and fireformed. I will seat the bullets with 360EX dies.
Hopefully the loaded ammo fits the rifle (for me, an issue), fires fine, and groups. Will check the velocity as I will be looking for 1700 fps. Is that a reasonable velocity?
I will be looking for 8x58.5r S&S brass that I can fireform into 9.3x58.5r brass. (From my web search, the 9.xX58.5r S&S brass isn't available but the 8x58.5r is sometimes available.)
