851c,
I don't know what happened, I wrote an answer to your last post yesterday and it must not have been picked up. Being pretty "wordy" I wrote more, but the following is a shortened version. For the Reilly that misfires, I suggest you try 38-55 original length (2.125-130") cases. I often use them for different rifles and usually have to thin the rims but in my Husky 9.3x57R they don't need thinning. I have recently noticed that Starline has them in stock again, which means the regular suppliers should also have them. The 38-55 cases will be a little short but that will make little difference if you seat the bullet, so the cartridge has the same OAL.
I still believe your double rifle is 9x58 1/2R S&S instead of 9.3. I believe the confusion comes from the proof mark 118.35 which was often used on tighter bored 9.3x72Rs. Fireformed cases from a 9x58 1/2R S&S will show a tapered rather than shouldered case shape. You can use the long 38-55 cases in the double rifle, as well as the Reilly, but you may need to thin the rims. To use the 38-55 cases, you only need to size in 9.3x72R FL die and 8x58 1/2 die, FL if seating die won't get the mouth small enough. After fireforming, you can neck size and seat bullets in 9x57, or 35 Remington dies adjusted to the fireformed case. If the 0.359-.360" or 0.367" (not as likely) lead bullet will easily fit into the fireformed but unsized case it can be used "as is". Starline 38-55 cases (the long ones) will cost less than $1.00 ea., but 8x58 1/2R S&S cases will cost $4.00 or more ea. if you can find them. The 1700 fps is a reasonable velocity, depending on what you intend to do with the rifle. If you intend to hunt with it, you can likely speed the lighter bullet up some.
Good Luck,
Mike
