Well I just checked It again using the formula Bob gave me In that link.

Here's the results using 2 different methods-

Including the tip- 7.7%
Not Including the tip- 12.1%


According to Ashby I should go by the 1st result. I've never had a penetration problem but I can say this that this summer I'll be experimenting with this and most likely I'll be adding brass Inserts to get my weight and FOC up. Currently right now my arrows weigh In at 561 grains. That Includes my 125 grain Snuffer.