You don't provide much information, action strength, bullet weight, construction, intended velocity, so guys are reluctant perhaps to help.
I will make a blanket statement though, just my opinion, ball powders designed to operate at .308/.223 pressure levels will not be an ideal choice for a straight wall case designed to operate at SAAMI 30,000...if you have a modern 1886 Win, they do feed them loads up to 50,000. If you stay low you will likely have wild velocity swings and boocoo unburned powder in the barrel. Perhaps your time would be better spent doing some powder trading. Do not be offended.
