Should I shoot 100 or 125. My bow shoots around 210-220 fps and it set at 43lbs.
What shopuld I shoot.I am mainly hunting whitetail deer. The arrows sre Beamen
ventures 500.

i really have no idea what is better i use 125 but my bow is set at 65lb so i think that is would be better to use 100 and i have heard that 100 is good for deer but i have only been bow hunting like 3 times and i dont know anyone that does i just picked 125 u should talk to a person whereever u are buying them and they would be able to tell u what is bettewr

Buy a package of both, see which shoots better through your equipment.

I may be the wrong person to ask,
but i believe on the lighter poundage such as your 43#, it is best to go with the 100grain,
lighter poundage usually have lighter arrows, and a heavier 125gr may cause too much flex during flight,
but like the other guy stated not a bad idea to try both,
dont want to spend the money on broadheads, pickup some fieldpoints and try it out,

I'd go with the 100 but I think whatever you think flies more true to you. That is what i did when i was choosing what type of broadheads. I go after squrriel and rabbits with mechanicals.

What are the specs of your bow and what size arrows do you shoot? If you are overspined then you should pick the 125 grain heads.

Im with Zak, we need to know arrow and bow specs. More than likely, 100 grain will fly better. Even better, try and find some 75 grain muzzys or something along the lines of a lighter head. Im assuming with 43 lbs. of weight, you're going to need the lighter head cause otherwise your FOC will be off.

i shoot 100's. you get more speed, and with your poundage id say theyd be best. just my opinion

I would go with the 100 grain because you will get better speed and distance with them. I work at a archery shop so there is my 2 cents worth take for what it is worth.

85 gr. Thunderheads. 125s or 100s are gonna bounce ur arrows and you wont be able to tune it to save your life.