Hi again,
I was wondering how much of a difference 125gr muzzy 3 blade would make in terms of speed and KE as opposed to the 100gr. Do you guys prefer one over the other? Thanks for your advice.

Not enough speed to worry about..Shoot the onethat your bow was tuned for and go kill a deer.Good luck

According to Physics it doesnt matter, Kinetic Energy will be the same in both for example your broad head is 4g and shoots 2 fps your ke will be 8. If you decrease weight by half your speed will double so 2g will go 4fps ke is still 8.