I do not like Blue Dot. I tried the powder in 9mm, 38 Spl, 357, 44 Spl, 44 Magnum, 45 ACP and 45 LC.
The only application that worked well was with Jacketed bullets in the 357. Even then, I got leading with cast bullets in the 357 at velocities with the same bullets that did not create leading with 2400 and AA#9 . Guess what powders I recommend in the 357 Magnum: H110, 2400, and AA#9. I have no idea why 357 Magnum cast bullets leaded with Blue Dot, but they did, and I don't like cleaning out leading. Blue Dot burns poorly at anything but Magnum pressures. With non magnum loads, I had teaspoons of unburnt powder rolling around in my fired case box. In non magnum loads, my chronograph data shows huge extreme spreads, around 200 fps, showing that the powder is not burning completely. I consider high extreme spreads as risky. I want a smooth, consistent pressure curve and weird and erratic pressure curves can only create trouble.
I did shoot it in 45 ACP. Even when the velocity average was 800 fps in a M1911, it gave a very hard recoil. Which indicates a high residual breech pressure at unlock. Maybe if you are shooting something like a Thompson, or a blowback submachine gun that has a heavy breech block, it might work well. But I don’t want to peen the frames of my pistols.
I think it is an awful powder and don’t wish it on any one.
But, go back to your Oct 2006 Handloader magazine and the Propellant Profiles article by R.H. VanDenburg Jr . The author really bally hoo's Blue Dot. He starts off with a tried and true literary device: the author just happens to have a conversation about the product he is promoting. These conversations are sometimes with “wise gray beard”, some “unnamed celebrity”, or in this case, an “energetic young man”. You can rest assured that the conversation never took place.
Nothing in the article involves any other research than a reiteration of the Alliant Reloading guide, No extreme spreads of velocities, typical statements “perhaps ideal..”, “ is a favorite of many…” ends article with “Blue Dot is an exceedingly useful powder”. I really dislike advertising dressed up as editorial content.