Hi all! First post here, I've been wanting to get into CAS for years, my big hold up was getting a rifle, they were always out if my budget. However at the start of February we were on a trip to Tuscon and I found an Cimarron 1873 trapper used for a price I couldn't pass up. I've been going through it and learning about it, from what I can tell it's already had a lot of work done to it for CAS, it has an aluminum carrier, extended firing pin, a super short stroke kit (I think), and a mag tube with the right internal diameter for 357/38 shells, as well has some nice engraving on the receiver.
I took it to the range and it was deadly accurate at 100 yards with 357 loads, however when going to resize the brass I discovered that some of the brass had a bulge. After doing research, I now believe the headspace is too long. It had zero issues functioning, but it's something I'd like to fix or make sure it's correct for the longevity of the rifle.
With a case in the chamber I can fit a .025 feeler guage between the bolt face and cartridge, without calipers to measure the rim, and knowing that the average 357 rim is .060, my headspace would be ~ .085 correct?
Now where I need help, is I can't find anything that states what the headapace is when it's correct. It could be my fault for not searching correctly. Any advice, input, or information would be greatly appreciated!