Mike,
Thanks for all of the information. I have been reloading since the mid 70's and broadening the variety ever since. My first attempts were with the old Lee hand loader setup and a leather hammer in 30/30. Still a very accurate option over factory rounds. I really like high velocity wildcats and odd rounds which leads to the need to alter other common brass to fill my need. I have used the chamber casting with both wax and carasafe to identify the proper rounds. So far all have been more modern rounds, so I am lacking, I guess, in reading this particular casting. I believe what I am looking at fits the 10.75 colloth, and assumed it should have the case length to match the ridge in the casting which is 70mm however looking at data on the 10.75x65 Colloth I see a case length just over 2-1/2 inches with a cartridge length just over 3 inches. The 3 inches is near the distance to the lands of rifling, so I believe this to be correct. Do you know the importance of the ridge or is it cut plenty deep to allow stretching of the brass over time? Do you believe I have identified the correct round or do you think it may be another obsolete round? These are the things that cause me sleepless nights.
Thanks
Tim
