Mata,
I didn't address your questions in my earlier post, only stated what I have been shooting. I can tell that you have read thoroughly the studies done by Dr. Ashby and seem to understand the principles fairly soundly. If your arrows are well tuned to your bow, I would not worry about getting complete pass throughs. Your broadheads are getting to the vitals and a heavier arrow will out penetrate a 10-12 gpp arrow every time, if and only if, you have a well tuned arrow and a scary sharp, broadhead with high structural integrity. Speaking of structural integrity, I would bet that everyone posting on this thread shoots a high structural integrity broadhead. Dr. Ashby never stated that lighter setups don't work. His research just suggests that there is a better way. Unless you hit the scapula or ball joint, lighter set ups will work every time on broadside and quartering away shot angles. I would be willing to guess that you chose the heavy arrow path for the same reason that I did. Not because 10-12 Gpp setups don't work. They do, especially on whitetails. I hate losing animals. Animals move when they are shot at. I take quartering to me shots on unalerted animals. I witnessed three different kills last year (broadside shot angles) that the deer moved a lot between the release and impact of the arrow (Two were mine). All three animals were killed with a 11-12 gpp setup. The arrows did not have to deal with anything other than rib bones and got the job done. The more I researched, the more I became convinced that a heavy arrow would give me more margin for error when shooting at live animals. So far, that has played out. Every shot isn't going to be a pass through. Especially when animals are often in motion as the arrow is going through them. Keep in mind, that Dr. Ashby continually states to shoot the heaviest arrow that you can live with the trajectory of.