Several years ago I got a NOE plain based 165 Ranch Dog mold for my young Grandsons 30-30 to build lighter loads for the skinny kid to practice with. I got to wondering about it in my 308 for deer hunting, it shoots good powder coated but would like to speed it up a bit. Ordered some plain base gas checks to try, but they took so much pressure going through the sizing die I about had to jump up and down on the press handle. Afraid I was going to break the die or the Rock Chucker I quit using them except on standard GC bullets. Is this normal or did the supplier ship the wrong checks?