It would appear that we are "between runs" of 32-40 brass from Winchester (who AFAIK is the only factory making it now.). Never fear though, it is easy to reform 38-55 brass, readily available from StarLine, into 32-40 specs. I've done it on a standard press using the regular FL sizing die from my 7/8 x 14 die set and making about two or three short passes to avoid grease dimples. I can tell you that the 310 tool will do a fine job with the resulting altered (or original) brass. Most of the loaded ammo I have shot in my original high wall has been made using those same little dies in a TruLine Jr press... the results were gratifying!
Froggie