Operating pressures in either Luger cartridge should be high enough to make Unique burn smoothly. In magnum revolvers I view it as suitable for midrange loads, too fast for max velocity loads. A little off topic, but I have used 10.4 grains of Unique with a 245 grain cast bullet for years as a midrange load in the 44 magnum.
I would not use magnum primers in the small Luger cases.
Winchester 231 will work well in a good load but it can go over max pressure rather quickly if you putin a tad too much. It's too fast to reach maximum velocity in the 7.65 without going over SAAMI limits. Seems to be better in the 9 mm.
|