RE: Are we going backwards using lighter faster tackle?
Small white tail deer are easy to kill with just about anything. I have killed a pile of them in the 100-150 lb. weight and they die quick. Once animals exceed 250 lbs. it is a whole new ballgame. I did the light fast thing for a couple of years and noticed a substantial decrease in penetration on big bucks withanything other than a rib cage shot.
I coulndn't get an arrow through an elks' scapula and only got complete passthrough shots a couple of times through the rib cage. I increased my arrow weight by about a hundred grains and am back in the game again on elk and bigger animals. It was a scary learning curve and Ihad some LONG tracking jobs with only one bleeder hole.
As of late I have been shooting some 140-185 grain broadheads of my own design and am really impressed with their penetration and flight characteristics. Thanks for the feedback. Flinch