Spine question

[Chain2]

I'm guessing that the insert length would affect overall spine of said arrow. I have some long 50 gr alum inserts and some shorter brass. Arrow with longer insert should be stiffer. Or is this just splitting hairs? Thanks guys

[Bjorn]

Most of the bending occurs in the middle a little length won't have any effect at the tip; but weight will.

[ISP 5353]

What Bjorn said!

[Chain2]

I was thinking that a longer insert actually "shortened" the bendable part of the arrow.