RE: FOC mystery
if your arrows alumin are over 400 grs and shoot fine,only reason i would up the weight is if i thought it would be too light for bow and cause limb damage..
as KLS said, get 125 points,alumium front insert, go to 2 inch blazer vanes.
me, i stayed with 100 gr points but did change to 2 inch vanes and aluminum inserts.
crossbow guy matthius in italy has tungsten inserts that will take you up to 500 grs,you just glue them in and you are ready to go.