Dave
Here are some links to articles that should contain those numbers. Be aware that most useful cases are fromed from 45-70, 45-90 (see thread somewhere on ASSRA) or 8X56Rimmed Hungarian Mannlicher, the latter can be directly fire-formed, taking care that they headspace on shoulder rather than on 8X56R rims (that are too thin). 2mm short cases have proven "no problem" in actual use.

Beware of expensive Bertrium cases, as well as cases Buffalo Arms forms from stretched 45-70 -- brass in both is commonly very brittle and you have excellent chance to lose 50% or more on first shot, even with extensive annealing, to long splits in middle of case bodies. Many of us have Swedish rollers that need full rim thickness of 45-70 cases (0,07").

Be sure to measure groove-to-groove diameter of your rifle. Many/most are larger than 0,323, often 0,324 or 0,325 or a bit larger. Can/will make big difference in group size with cast bullets.

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Grisen

Fred,
Good to hear that you got excellent service from Bertrum brass. I hear good to excellent reports and very negative reports. Seems quality varies widely. Of the 20 cases I bought, only one has split length-wize on body -- and my 8X58RD has a rather tight chamber. In part I quit using my Bertrum cases because their rim thickness is too small for my rifle, in part I quit using them because 8X56RHM brass from Privi Partizam cost much less and has given me no problems at all -- it is excellent brass. Splits in necks are what cause me to toss  PP brass, as it does with various other excellent brass used in late 1800s rifles that have overly large chamber neck dimensions. Even so, they last 10++ firings.

Grisen

Fred,

All of my 1st hand and most of my 2nd had experence with Bertrum has been with 8X58RD. Part of that problem has been that Bertrum was apparently not making 8X58RD brass to same specs as Carl Gustaf Stads armory made chambers in those converted 1869 Remington-pattern rollers -- Bertram's was too small in body, considered basic reason for cm+ long splits in bodies on 1st firing. Don't know anyone that anneals brass more than 1/2 way down toward case heads.

Well, yes, split in case necks are an indication is time to anneal, or, to fix the basic cause, too large throats or too small bullets. Some of my most used brass has never been resized or annealed or crimped and bullets used are snug finger-fit into cases. Never had a split and don't expect any. I am now very close to that with 8X58RD and cast bullet loads. 

In case you are not familier with 8X58RD case, it is very similar to 33 Winchester case. Sized down 45-70 makes nice 33 Win cases, as well as 8X58RD, except that they are 4 mm too short for latter. Several of us wonder if 45-70 was case that 8X58RD was derived from, strengthened by so many of our 8X58RD rollers needing same rim thickness as 45-70.

All of this experence may pertain much less to Danish and Norwegian Krag-Jørgensen turnbolts.

Regards,
Grisen

8 X 58 R cases made from .45-90 cases

Dave,
Really nice looking 8X58RD cases!! The few I made from Starline 45-90 cases are definately ugly, but they do work, especially for "pseudo breechseating".

Be interested what loads you arrive at and their downrange performance.

Nice,
Grisen

I put a Marbles Improved Tang Peep base with midrange staff on mine. I have bad old eyes, especially master eye, so, issue military sights were/are hopeless. That has worked well for me for many years.

My standard load is 205 grain GC bullet intended for 8X56Rimmed Hung. Mannlicher at about 1500fps (about 20gr IMR SR4759, one of my favorate powders for mid speed cast bullet loads).

Grisen