As far as it being a safe load, you did fine (very good).
Depending on if your bullets are jacketed or cast you should see 1,000-1100 fps and you are under the maximum pressure limits.
Unique is a good powder at that velocity/pressure range. If you are wanting more, let me know, but 1,000-1,1100 fps. will do for 95% of what a 41 Mag is capable of. With cast bullets the returns are minimal and jacketed expanding bullets are about the only things needing full house loads to work as designed.
