Don't really want to alter the bow as I've got 3 dozen arrows flying perfectly. My trouble is that I'm trying to make up some really light weight pine shafts. The bow is 71# at my 29" draw length. I've been shooting 75# 11/32" Pines arrows cut to 31" with 125gn field points.
What I want to do is build up a set of 5/16 using 30-50gn points. I bought a dozen 48# 5/16" shafts & I'm just trying to dial them in. The idea being that the lighter the arrow, the flatter & faster it'll fly giving me more margin for error in my range estimation.
They're for shooting at 3D courses which typically (over here) give an average distance of 40yds & can stretch out to 100yds!
This is all purely experimental, I'm perfectly happy with my big ol' 11/32"ers, I'm just tryingto gain as much advantage as possible (we ain't allowed to shoot carbons in my class :( )