Say a fellow had 100 once fired Federal .30-30 cases with no purpose in life other than taking up shelf space, what might be a good recommended load to use to fireform them to .38-55 cases using a cream of wheat filler? Or at least a decent starting point so as not to waste time and powder starting too low. I have Unique which worked well to make .250 Savage AI cases from .22-250, but also have Win 231 and Ramshot Zip on hand. Being as the .38-55 is a straight (slightly tapered) case, sharp shoulders are not an issue here...
Rifle is a modern reproduction Winchester 1885 so it's pretty strong.
