Good thread, I plan to develop a long range .357 for my Ruger 77/357. The SAAMI chamber is long enough to fit a decent length bullet, provided I use it as a single shot rifle (the mag is too short otherwise). Everything to be pre-checked in Quickload, and slowly worked up with a chrono of course.
I think I'd need jacketed so I was looking at resizing a 35 calibre bullet using a Lee resizing die, but the first problem is finding something with a decent balistics coefficient which is neither too heavy or too long. Have a look here: http://35cal.com/bullets.html
The bigger problem for me is that I can't have expanding bullets