Thread: Straight wall nitro cases. Who uses filler and what ?

I now use no filler in my 38/55 with nitro and it's just on half full with 4227. Tried loose wool and felt wads but it made no difference. In the 45/70 I use carded wool loosely packed to the case mouth and "compressed" by the bullet. I used to run it without filler but got a lot of unburnt powder, the loose packing solved that.