Thanks for the clarifications.

I'm very interested in this latest report.  I now have to shoot a 41# bow due to shoulder problems and I hunt elk with it.  Last year I was confident (Thanks to the good Dr.) in my arrow setup shooting a 630 gr. arrow (just a bit under the 650 threshold recommended) with 20% FOC.  I shot a cow elk and got 20" of penetration after hitting a rib.  My bow was only shooting those arrows at 140 fps. Nobody I know would recommend shooting an elk with a 41# recurve (and people don't believe me when I tell them that I do), but now I would recommend it if the perfect arrow is used.

Doug, my friend had the same experience but with a 6 x 5 bull and he pentrated up to the feathers with a 45lb recurve. The bull only went 60 yards.

My wife and daughter will be hunting elk with 40 lb bows and efoc arrows this year.  I am not the least
Bit worried about their arrow penetration.  All thanks to Dr Ashby's studies.

Anyone would think I could remember all these things since I worked (somewhat) with Ed when he was doing part of his studies. Like anything else when you drop off the map for a few years you start to develope the CRS syndrome.

I posted some of these same questions on another thread over at the powow talking about the Tuffhead broadhead.

Thanks for the help amigos...

Troy

Great post Ed. Thanks for the info.