I have 2 sets, 10-12 and 12-28. With low power loads, I have no Problem at all. I use a dowel to push the empty out. My 10 "E" Lefever makes a fearsome trap gun using them. Once I shot a 3' ultrasuperwhoopydoo load of # 4 buck in a 3 1/2 Double I had. I got a grant from the Ford Foundation to fund its removal. They are great, used sensibly..