I just want to change because I like the hot pink arrows, they will match my bow!
And I started off using a 100g head but one day on a whim I tried 125g and instantly my groups were tighter at 20 yds and farther. The pro shop guys said the heavier head probably "took the spine out of my arrows sooner". Not to mention I get awesome FOC (nearly 17%) - which I think helps get more pass penetration. I got a passthrough on my buck last year. And that's the only deer I've ever shot with my bow so I don't have anything to compare it to.