Have had good luck with the following loads in more than one 38-55. Work them up for safety. All use Win. brass and CCI200 primers, seated to crimp groove and crimped if necessary.
30.0 RL7, 255gr Barnes or Win. bullet, avg. vel. 1750, about a max load. Hunting load.
27.0 RL7, 250gr cast bullet, linotype, fairly fast cast load at 1670 fps.
quarterboredave
Your top 2 Loads are as the same or about what i have been using on my 38-55
I'm 29.5 and 27.5 on both, and both work well.
"April is National curmudgeon month" grin