Only carbon I've had break was one sticking out of a deer and he feel over and broke it off at the body. Other than that back when I use to shoot aluminum arrows, I had one fold up n come apart out of my bow, scared the crap right out of me for sure !! We were at a 3d shoot and just had started the second half. Needless to say my nerves were shot and I flopped most of the rest of the day. One thing is the way them things break is unbelievable !