1st time post. Just joined but have been reading for some time. Just started shooting this year and I need to ask a question. What exactley is a "crud ring". I bought a used Omega 50 cal and have been very pleased with it. I am using 777, 100 grains with 250 Shockwave sabots. I swab between shots but after 4 or 5 shots it gets very difficult to load the sabot. Do I have a crud ring? How can I tell and how do I get rid of it? Also, will all powders give you a crud ring? Thanks for any help