Does a heavier weight fixed balde broadhead help with accuracy,and will a three blade plane more than a two blade?

put this in the bowhunting forum or traditional archery it will get a much quicker response

Depends on both questions.

Its fairly critical to get the spine right with traditional equipement shooting of the shelf. You want 12% FOC with trad and I like 16-18%. But you also use the head wieght to tune the arrow to the bow.

The planing depends on the head. A fixed solide magnus will plane more than say a vented three blade.

wrong section put in traditional section

I have moved this to the traditional forum.Sorry