I had an oring get so hard once that I thought it was actually a plastic part. That one took some effort, but I thought to myself afterwards that if I ever had an oring like that again, I was going to get a teapot steaming and use steam to soften the damn thing up. I haven't had to try it yet, but I'm sure that I will some day.I used a brass and plastic pick at first but couldn't get the rock hard Oring out. I finally tried a hooked dental pick and it came right out. I've checked in the reg bore with a bore scope and didn't see any scratches in the Oring groove but that doesn't mean there isn't any. I'm leaning towards there being a stubborn hair in there. I have 7 dogs so there's no lack of hair.







