Whats the deal with these things close up. Never shot them but ive been looking into ther BCs and im liking what im seeing. But i've read people are having trouble with these things not opening up on animals up close. Anyone here had that problem. I would plan to use these on long range hunting but if they wont open up on close shots then why should i use them cause i would rather not limit myself to long range shots only if i started using them.