I appreciate everyone's input.....but I'm just one of those that needs to know "why".

"Why" (in the setu I mentioned) is being overspined a bad thing? It has advantages (xtra weight). I haven't heard anything detrimental.....other than blanket overpsine rhetoric.

How much "correction" can occur at 300fps at <20yds? I'm being serious.

I never changed my setup between these arrows and the ones I shot that were much lighter (Radial X-Weaves) whenI was turkey hunting. I never had to chnge the sight. My target arrows were 60gr lighter....and I shot the exact same setup.....never moving anything. Never had to.

I just never experienced anything erratic.....or even close in my arrow flight.