Blue Dot has been my favorite powder in .41 mag for over 20yrs. I had several Emails with the powers at Alliant when the warnings came out. Seems that a lot of people were using the data for the 220gr Lyman 410459 for ANY bullet 210gr or better , even jacketed. As I've pointed out many times , the Lyman 410459 Keith-style bullet has a long nose and short shank. And , some recent lots were a tick faster than the norm. The Lyman Cast Bullet Handbook lists the max load with the 410459 as 16grs. This is WAY over max for any 210gr jacketed bullet. But some loaders think any bullet weighing anywhere near 220 is OK. They look for the highest load regardless of bullet. They think bullet weight is the only factor. And since a 210 weighs less than the 220gr 401459 , they think it's OK. And the 215gr bevel based SWC offered by many cast bullet suppliers has a longer shank than the 410459. This led to compressed loads with other bullets , frequent high pressures and a few blown-up revolvers.

I also think this may be part of the reason Lyman discontinued this mould. Their 215gr gas checked SWC , similar in shank length to the common 215gr bevel based SWC , has a max charge of 14.5.
Again , this is an older book/data so charges should be reduced by at least 10% and worked up carefully!

Since I'm no longer knocking down steel animals with my .41 Redhawk , I dropped my Blue Dot charge to 15gr with the 410459. I was loading 16.5grs of older lots with no high pressure.