This is a great conversation with lots of good info. I am glad it got refreshed.
I also found Universal to be a better than replacement for Unique for equivalent loads in 41 mag.
Unfortunately I have not seen a can of Universal on a retail shelf since the fire in the Clays factory a few years ago.
SR 4756 became my substitute. But I have since consumed the last of my hoard, and it is discontinued from the manufacturer.
Fortunately, in these dire times, I have been able to build a stock of Power Pistol, CFE Pistol & Longshot to go with the existing Titegroup and H110 on the shelf.
Power Pistol and CFE Pistol are of a proper speed to fill the niche voided by the absence of HS-6, Blue Dot, Universal, and SR 4756.