ndnchf,
RE: your post of October 12th on the case sizing dies and your initial use.
I had the same problem with the shell holder keeping the case from fully entering a 'sizing' die when reforming .22 Hornet brass to .25 Stevens sizes, and my solution also ended up with the 'roll' of brass above the rim, but I am able to do the 'sizing' in my reloading press using The "RCBS Primer Pocket Swageing tool Kit" and a 3/16 I.D. Fender washer.
My set up uses the small pocket swage punch, the stripper cup, and then the fender washer in a stack on the ram. the case is placed on the 'nub' of the swage punch and run up into the 'reforming' die a little at a time using the top of the ram travel "toggle action' to get the needed force. Of course this means I 'adjust the Die' downwards in about 1/12th to 1/6th turn increments to get the case all the way in to the rim.
Added 2014AUG19: The Press I originally used is a RCBS "JR-3" and was of the 'small ram and 7/8-14 thread type so Took a LOT of force to push case into resizing die where the Base Web starts. I now have a RCBS "RC" press with a new "Ammomaster 2" handle, which add about 4" in length of lever AND a Ball Shaped handle at the end. Greatly reduced effort as i thas a Large Ram and the Bigger Die thread with a reducer bushing to 7/8-14 size Threaded dies. I find i can push a .22 Hornet into a .25ACP Carbide sizing die all the way to the rim in one Stroke using only my upper body and a two armed grip while remaining seated. A trial run of .327 Federal Magnum cases down sizing in two stages to .318" Diameter took one cycle of the press fo reach die used and still the Seated Upper Body force applied with a two hand grip. Chev. William
Once the case is fully entered into the die, I use a hardened pin and light hammer taps to drive it back out the bottom while the die is still in the press.
With the 'spacer' fender washer used, the case primer pocket is not swaged out other than a small radius champfer at the moth of the pocket which is visible if you compare a unmodified case pocket to one of the modified ones.
As I do not own a large arbor press, and my bench mount drill press is not strong enough to use for this forming process, this is the way I found to do the case forming I needed to perform so far.
Your use of a Needle File to 'trim' the roll of brass is something I did not think of, I will need to try it on the next batch of cases I form.
A problem I have noticed in reforming Hornet Brass to .25 Stevens is that the cases, in the forming process, are not well supported in the forming die and sometimes come out with a 'curved body' that I need to work back to straight with a 'expander punch and multiple insert and remove cycles while rotating the case until it is a straight cylinder again. This is probably due to my working with the Hornet brass at full length and trimming to length after all the forming is done. I have not tried the 'Trim then Form' method yet but It seems the 'bottleneck design does not lend itself to radical trimming before forming.
Am I thinking correctly on this?
My dogs are clamoring to go 'out' so I will close for the moment.
Best Regards,
Chev. William