I'll bet that was a handful!
Back Home, Years Ago, in the dawn of reloading (well... at least for me) my brother and I were handloading for his 6" .41MAG S&W 57. We were both convinced that the higher we went with Unique, the more accurate the load was. I think we wound up 1 full grain over any reasonable published maximum... convinced it was The Load. No, we didn't blow the pistol up... which, in hindsight, is kind of a surprise, but it is completely knocked out of time and desperately needs a trip back to the Mothership for a tune up. This was before I found... and more importantly comprehended... a powder burn rate chart, and realized there were powders that would fling that bullet even faster than Unique, without risk.
I developed a healthy respect for Unique during that time... mostly how forgiving it was, but also how flexible it can be.