Arrow Penetration

This evening I came home from work greeted the family, had dinner and then went out in the yard and started flinging arrows. I like to start further away when I am fresh then move in closer as the light fades. I went immediately to 40 yards and started shooting. Using groups of three 355 grain arrows and three 405 grain arrows the results were not what I expected.
The heavier arrows were only using an 85 grain point and didn't feel right in my hand. Go grab one of your arrows. Do you feel the front end weight of your arrow? You should! These heavier arrows felt weird in my hands. I need to figure out the Forward of Center percentage of these arrows because the heavier arrows were hitting higher than the lighter arrows. The heavier arrows not only have a lighter field point they also use the hidden insert which pushes the FOC further back toward the middle of the arrow. You should ensure your arrows have a FOC in 12% - 15% range. This allows the fletching end of the arrow to guide the arrow instead of the business end!
In the morning I will try the heavier arrows with a 100 grain field point just to see if an extra 75 grains does anything to arrow drop.
I also thought the heavier arrows would give me more penetration into the target. NOT SO. Overall all arrows penetrated the same.
As far as grouping of the different arrow weights.... well, for sure, the lighter arrows grouped better. I want to be sure on this test so, in the morning, I will redo the test with a little heavier field point and check the FOC of the both sets of arrows.
The bow I purchased is featured in this month's print edition of Bowhunt America. Here is the link
http://www.bowhuntamerica.com/blogs/pse-x-force-dream-season-evo-bow-report/   go read about what they say and then click on the link for the 2" Rayzr feathers and buy some to guide your arrows!