RE: 100grains or 125grains
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,