I have been shooting muzzy's for the last three years & will be switching to a new brand this year. I have found a problem with muzzy that I don't like. I tend to shoot broad heads most of the year for target practice, & the broad heads tend to collect moisture. Then the tip rusts a little onto the barrel. Then one third of the treaded portin of the barel breaks rendering the barel useles. I will be shooting interlock this season as they are almost the same as the muzzy. (I know, if I took the broad heads apart every day & wiped them down, I would't have this problem, but I'm lazy)!