You said "ANY PROVEN OR PUBLISHED DATA WOULD BE APPRECIATED." If published data would be appreciated why not look in published data to find some? How would that work?
There is much PUBLISHED data for the 44 Magnum. Would that not be helpful?
OK, I ordered myself a S&W M-69 4.25 in. barrel .44 Mag/Spl yesterday. Also ordered a set of dies, brass, and bullets. I would like some suggested loads for it. I will have both 240 gr. coated lead SWC bullets (Missouri Bullet Company) and Hornady 240 gr. XTP JHP bullets. I have on hand both Remington and Federal large pistol primers, Unique, 2400, and Titegroup powders, both .44 Magnum and .44 Special Starline brass. Any proven or published load data would be appreciated. Thanks!