What powder could leave a white residue? I've never seen that before.
I don't know if this is the case with your gun but several years ago when I bought an Indian 1A1 FN the fired brass came out frosted. I gave the chamber a quick polish with some brass wool wrapped around a piece of wood dowel soaked in very fine polishing compound and the case frosting disappeared. YMMV.rough chamber = frosted brass
Whats a lever action sako?



























