Blue Dot is great for 10mm. As someone above posted AA#7 is another great 10mm powder for handloading. I load mostly jacketed bullets for my 10mm as I too like to push the 10mm to it's potential and I don't like to clean out leading. Precision bullets make hard cast bullets with a black coating of some sort that seems to reduce the smoking and leading so I use them from time to time. If you have other powders you want to try or other bullets let me know as I have been loading the 10mm for over ten years and I have a lot of data, both personal loads and data collected from the net and manuals, manufacturers, etc. If there is enough interest I can post a fair amount of it here. Glad to see another 10mm fan and handloader.