never!! i always try to watch and make sure i dont...and the biggest caliber ive every shot was a really hot 300 weatherby mag loaded to the max i think.....my friend caught some scope eye from a 3006....split his eye right open...scar and evrything...i remind him all the time and we laugh about it....i hope that never happens to me...im sure it would help develop a pretty bad flinch......i guess im lucky....i know i will never quit watching....and all my guns i had the scope put on to my specs...so its perfect and i can shoot it comfortably and hold steady.....