In an 1891 action I wouldnt go any larger than a 35 REM
You don't have to load a .358 to full pressure loads. For that matter, if the OP makes his 9x53 wildcat, what data does he have to ensure working within 7,65x53 pressure?
That's a great question, and I think I could use 358 starting loads as a good beginning. However, Ive also got the Gordon's Reloading Tool available to me to determine if I can get better approximate load data as well
