I've got an older Lyman book that has data for that round.
They list loads for Bullseye, Red Dot and Unique.
The test gun was a Mauser HSC, 3 inch.
The bullets used were either a 71 gr. jacketed, or a 77 gr. cast, #311252.
Data was the same for both bullets. BE start load was 1.5 grs. and the max was 2.2 grs. RD start load was 1.7 grs. with a max of 2.5 grs. Unique's sart load was 2.0 grs. with a max of 3.1 grs.
Velocities were BE, 603 fps - 825 fps. RD, 705 fps. to 937 fps. Unique was 571-945 fps.
Maximum case lenth was .680 with a tirm to lenth of .672. Maximum loaded OAL was .984". E