I am new to black powder and recently bought a White Ultramag in 50 cal. After shooting about 30 rounds through it, it would not fire properly. I took it apart and noticed I could not look through the nipple. I ended up using a safety pin and oil to get all the crud out. How often should I clean the nipple out and is there an easier way? I cannot use 209 primers and have to use #11 primers in Oregon.