Grizzly broadhead question

[davidthearcher]

Based on Dr. Ashby's reports, I'm going with Grizzly broadheads on the arrows I'm building for an upcoming South Africa trip. He recommends to make your fletching match the spin of the broadhead for best penetration results, but does not list the direction they spin. I'm thinking they spin to the right (clockwise as the shooter views the arrow leaving) and therefore should go right helical, but I have no medium available to confirm this for me. Anyone have any ideas?

[J from Denmark]

Hi D
 
Thats correct !
 
Jacob

[Falk]

David,
you are right with "right" - as Jacob sayed AND Doc Ashby said also! I am quite sure it was written just so in one of his latest reports - available here on TradGang.

You can really observe the spinning effect Ashby is talking about! When you take a close look on your practise heads - after using them for some time - the color will first come off in spots along the left edge of the blade! See pic:
 
The encircled area has almost lost its color whereas the rest is still quite good. This abrasion effect here is caused due to the spinning action alone - indicating more pressure running along the left edge in comparison with the right side. The full ferrule is effected also - of course. Showing what resistance to penetration is caused here.
You can observe this "edge-effect" more or less on every Grizzly - depending little bit on what target material you use. If you want to speed up the process shoot them into a sandbar.

Cheers, Falk

[davidthearcher]

Thanks for confirming that for me. Falk, that picture makes sense that the left edge would wear since it the the point of contact on rotation. I love this website. Thanks for the help.

-dave