My buddy sighted in his new USH last weekend. He had to get one after shooting mine. He said he put about a dozen rounds through it over about 15 min. at different distances so he didn't just sit there and shoot one after another. Then on the last shoot his shell would not eject. I figured that maybe it got a little warm and that is why it stuck. What do you think? How much would this effect his accuracy because he didn't shoot it any more and now he is worried that his zero might be off? Thanks guys.