Continued experiments with powder coated boolits in my 7mm Mauser. Today I soared to an amazing 2920fps with a 139gn Lyman cast bullet (red). After 15 rounds I could not detect any leading so I moved to a 150gn RCBS boolit (black) and reduced the powder charge by 1/2 grain.
Next week I hope to test loads prepared for the 243 Winchester.