Re: Different long range cartridges
Go to the Lilja barrel site and read his article on LR hunting. Will cover many of the cartridges suitable.
There is also lots of info on the net if you do google searches. Mag like Rifleshooter and Handloader will give info on some of the more obsure wildcats.
Of course, you can look at reloading manuals like Nosler #5 and the new Lee for lots of load data that can apply to your wildcat if the case volume and cal are similar.
If you have specific questions, I am sure that we will provide info.