Hey guys, I'm currently shooting 100gr tips on 29.5" CX300's for a total arrow weight of 380. I am thinking of going to 125gr because I'm worried that my arrows are a little light for hunting (whitetails only) and my bow shoots a little more quietly with heavier arrows. My questions are: What effect will the extra weight have on my speed? I'm shooting 285fps right now and I'd like to be able to shoot one pin to 30yds. Will the heavier points result in my arrows being under spined? My draw length is 31" but my Bodoodle rest lets me shoot shorter arrows (don't know if the extra draw length makes a difference). FOC will change from 10.3 to 12.6. Is 12.6 better or worse? Lots of questions, but I'm relatively new to all these calculations. Thanks for any help.