I am still gathering info on my project. Locutus was kind enough to PM me with some good advice. With his permission, I am posting it:
"You might tru Barnes and Noble and look for the Lyman Reloading Manual, ABCs of Reloading, Lymanb cast bullet handbook etc.
.30-06 to 7.65 is fairly straightforward.
Get the brass really, really clean, resized and decapped in a .30-06 sizing die.
Lube it with your fingers and something like Imperial sizing die wax, or RCBS case lube. (NOT the spray.)
Put the 7.65 die in and screw it down to barely touch the shellholder. SLOWLY run the case all the way into the die. This will shorten it and lengthen the neck.
If you use the RCBS case forming die, you can cut the excess off with a hacksaw at this stage. If you use a regular sizing die, the case must be shortened with a trimmer. (hint. trimmer=lotsa work)
At this point, I like to outside turn the case neck with a turning tool ro thin it back down to normal diameter.
Do one case, then run it into a case gauge or chamber it in your rifle to see if it fits. If all is well at this point, modify all the others you plan on modifying.
Now you anneal the necks to the middle of the shoulder. This is an important step.
When you reach this point, you just reload normally. This sounds complicated, but it really isn't. You just can't skip any steps.
When working up loads with any case formed from another caliber, go slowly, since these cases may be a little thicker and heavier than factory 7.65.
Hope this helps. " This pretty much echoes what I have been able to find here and there on the web (bits and pieces). The only confusion I find is that there are different opinions on when to anneal the case. One school believes annealing should come before re-forming (to make the brass easier to work with during the case forming process) and the other school suggests annealing AFTER caseforming (to get rid of the work hardening which results from re-forming the case). Some people have even suggested annealing it twice (for the two reasons listed). I'm still not sure what I'll do here.
Also mentioned in this advice is the RCBS ".30-06 to 7.65 case forming die. It is found on the Midway site here:
To me, this is the way to go. The top of the die is hardened to resist a hand file and seems to be the best way to re-form the case and cut/file to length at the same time. Of course as luck would have it, it's on backorder...and with the demand for reloading supplies being so high right now (and an obscure Argentine caliber die not being so high) it may take some time before I can get one. Figures...
Also, I am getting two different suggestions on bullet diameter (.311 and .312). Aside from slugging the bore, does anyone know? Thanks for all the help.